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 <string.h>
  27 #include "pipe/p_screen.h"
  28 #include "util/u_memory.h"
  29 #include "util/u_rect.h"
  30 #include "egldriver.h"
  31 #include "eglcurrent.h"
  32 #include "eglconfigutil.h"
  33 #include "egllog.h"
  34
  35 #include "native.h"
  36 #include "egl_g3d.h"
  37 #include "egl_st.h"
  38
  39 /**
  40  * Validate the draw/read surfaces of the context.
  41  */
  42 static void
  43 egl_g3d_validate_context(_EGLDisplay *dpy, _EGLContext *ctx)
  44 {
  45    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
  46    struct pipe_screen *screen = gdpy->native->screen;
  47    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
  48    const uint st_att_map[NUM_NATIVE_ATTACHMENTS] = {
  49       ST_SURFACE_FRONT_LEFT,
  50       ST_SURFACE_BACK_LEFT,
  51       ST_SURFACE_FRONT_RIGHT,
  52       ST_SURFACE_BACK_RIGHT,
  53    };
  54    EGLint num_surfaces, s;
  55
  56    /* validate draw and/or read buffers */
  57    num_surfaces = (gctx->base.ReadSurface == gctx->base.DrawSurface) ? 1 : 2;
  58    for (s = 0; s < num_surfaces; s++) {
  59       struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
  60       struct egl_g3d_surface *gsurf;
  61       struct egl_g3d_buffer *gbuf;
  62       EGLint att;
  63
  64       if (s == 0) {
  65          gsurf = egl_g3d_surface(gctx->base.DrawSurface);
  66          gbuf = &gctx->draw;
  67       }
  68       else {
  69          gsurf = egl_g3d_surface(gctx->base.ReadSurface);
  70          gbuf = &gctx->read;
  71       }
  72
  73       if (!gctx->force_validate) {
  74          unsigned int seq_num;
  75
  76          gsurf->native->validate(gsurf->native, gbuf->attachment_mask,
  77                &seq_num, NULL, NULL, NULL);
  78          /* skip validation */
  79          if (gsurf->sequence_number == seq_num)
  80             continue;
  81       }
  82
  83       pipe_surface_reference(&gsurf->render_surface, NULL);
  84       memset(textures, 0, sizeof(textures));
  85
  86       gsurf->native->validate(gsurf->native, gbuf->attachment_mask,
  87             &gsurf->sequence_number, textures,
  88             &gsurf->base.Width, &gsurf->base.Height);
  89       for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
  90          struct pipe_texture *pt = textures[att];
  91          struct pipe_surface *ps;
  92
  93          if (native_attachment_mask_test(gbuf->attachment_mask, att) && pt) {
  94             ps = screen->get_tex_surface(screen, pt, 0, 0, 0,
  95                   PIPE_BUFFER_USAGE_GPU_READ |
  96                   PIPE_BUFFER_USAGE_GPU_WRITE);
  97             gctx->stapi->st_set_framebuffer_surface(gbuf->st_fb,
  98                   st_att_map[att], ps);
  99
 100             if (gsurf->render_att == att)
 101                pipe_surface_reference(&gsurf->render_surface, ps);
 102
 103             pipe_surface_reference(&ps, NULL);
 104             pipe_texture_reference(&pt, NULL);
 105          }
 106       }
 107
 108       gctx->stapi->st_resize_framebuffer(gbuf->st_fb,
 109             gsurf->base.Width, gsurf->base.Height);
 110    }
 111
 112    gctx->force_validate = EGL_FALSE;
 113
 114 }
 115
 116 /**
 117  * Create a st_framebuffer.
 118  */
 119 static struct st_framebuffer *
 120 create_framebuffer(_EGLContext *ctx, _EGLSurface *surf)
 121 {
 122    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 123    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 124    struct egl_g3d_config *gconf = egl_g3d_config(gsurf->base.Config);
 125
 126    return gctx->stapi->st_create_framebuffer(&gconf->native->mode,
 127          gconf->native->color_format, gconf->native->depth_format,
 128          gconf->native->stencil_format,
 129          gsurf->base.Width, gsurf->base.Height, &gsurf->base);
 130 }
 131
 132 /**
 133  * Update the attachments of draw/read surfaces.
 134  */
 135 static void
 136 egl_g3d_route_context(_EGLDisplay *dpy, _EGLContext *ctx)
 137 {
 138    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 139    EGLint s;
 140
 141    /* route draw and read buffers' attachments */
 142    for (s = 0; s < 2; s++) {
 143       struct egl_g3d_surface *gsurf;
 144       struct egl_g3d_buffer *gbuf;
 145
 146       if (s == 0) {
 147          gsurf = egl_g3d_surface(gctx->base.DrawSurface);
 148          gbuf = &gctx->draw;
 149       }
 150       else {
 151          gsurf = egl_g3d_surface(gctx->base.ReadSurface);
 152          gbuf = &gctx->read;
 153       }
 154
 155       gbuf->attachment_mask = (1 << gsurf->render_att);
 156
 157       /* FIXME OpenGL defaults to draw the front or back buffer when the
 158        * context is single-buffered or double-buffered respectively.  In EGL,
 159        * however, the buffer to be drawn is determined by the surface, instead
 160        * of the context.  As a result, rendering to a pixmap surface with a
 161        * double-buffered context does not work as expected.
 162        *
 163        * gctx->stapi->st_draw_front_buffer(gctx->st_ctx, natt ==
 164        *    NATIVE_ATTACHMENT_FRONT_LEFT);
 165        */
 166
 167       /*
 168        * FIXME If the back buffer is asked for here, and the front buffer is
 169        * later needed by the client API (e.g. glDrawBuffer is called to draw
 170        * the front buffer), it will create a new pipe texture and draw there.
 171        * One fix is to ask for both buffers here, but it would be a waste if
 172        * the front buffer is never used.  A better fix is to add a callback to
 173        * the pipe screen with context private (just like flush_frontbuffer).
 174        */
 175    }
 176 }
 177
 178 /**
 179  * Reallocate the context's framebuffers after draw/read surfaces change.
 180  */
 181 static EGLBoolean
 182 egl_g3d_realloc_context(_EGLDisplay *dpy, _EGLContext *ctx)
 183 {
 184    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 185    struct egl_g3d_surface *gdraw = egl_g3d_surface(gctx->base.DrawSurface);
 186    struct egl_g3d_surface *gread = egl_g3d_surface(gctx->base.ReadSurface);
 187
 188    /* unreference the old framebuffers */
 189    if (gctx->draw.st_fb) {
 190       EGLBoolean is_equal = (gctx->draw.st_fb == gctx->read.st_fb);
 191       void *priv;
 192
 193       priv = gctx->stapi->st_framebuffer_private(gctx->draw.st_fb);
 194       if (!gdraw || priv != (void *) &gdraw->base) {
 195          gctx->stapi->st_unreference_framebuffer(gctx->draw.st_fb);
 196          gctx->draw.st_fb = NULL;
 197          gctx->draw.attachment_mask = 0x0;
 198       }
 199
 200       if (is_equal) {
 201          gctx->read.st_fb = NULL;
 202          gctx->draw.attachment_mask = 0x0;
 203       }
 204       else {
 205          priv = gctx->stapi->st_framebuffer_private(gctx->read.st_fb);
 206          if (!gread || priv != (void *) &gread->base) {
 207             gctx->stapi->st_unreference_framebuffer(gctx->read.st_fb);
 208             gctx->read.st_fb = NULL;
 209             gctx->draw.attachment_mask = 0x0;
 210          }
 211       }
 212    }
 213
 214    if (!gdraw)
 215       return EGL_TRUE;
 216
 217    /* create the draw fb */
 218    if (!gctx->draw.st_fb) {
 219       gctx->draw.st_fb = create_framebuffer(&gctx->base, &gdraw->base);
 220       if (!gctx->draw.st_fb)
 221          return EGL_FALSE;
 222    }
 223
 224    /* create the read fb */
 225    if (!gctx->read.st_fb) {
 226       if (gread != gdraw) {
 227          gctx->read.st_fb = create_framebuffer(&gctx->base, &gread->base);
 228          if (!gctx->read.st_fb) {
 229             gctx->stapi->st_unreference_framebuffer(gctx->draw.st_fb);
 230             gctx->draw.st_fb = NULL;
 231             return EGL_FALSE;
 232          }
 233       }
 234       else {
 235          /* there is no st_reference_framebuffer... */
 236          gctx->read.st_fb = gctx->draw.st_fb;
 237       }
 238    }
 239
 240    egl_g3d_route_context(dpy, &gctx->base);
 241    gctx->force_validate = EGL_TRUE;
 242
 243    return EGL_TRUE;
 244 }
 245
 246 /**
 247  * Return the current context of the given API.
 248  */
 249 static struct egl_g3d_context *
 250 egl_g3d_get_current_context(EGLint api)
 251 {
 252    _EGLThreadInfo *t = _eglGetCurrentThread();
 253    EGLint api_index = _eglConvertApiToIndex(api);
 254    return egl_g3d_context(t->CurrentContexts[api_index]);
 255 }
 256
 257 /**
 258  * Return the state tracker for the given context.
 259  */
 260 static const struct egl_g3d_st *
 261 egl_g3d_choose_st(_EGLDriver *drv, _EGLContext *ctx)
 262 {
 263    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 264    const struct egl_g3d_st *stapi;
 265    EGLint idx = -1;
 266
 267    switch (ctx->ClientAPI) {
 268    case EGL_OPENGL_ES_API:
 269       switch (ctx->ClientVersion) {
 270       case 1:
 271          idx = EGL_G3D_ST_OPENGL_ES;
 272          break;
 273       case 2:
 274          idx = EGL_G3D_ST_OPENGL_ES2;
 275          break;
 276       default:
 277          _eglLog(_EGL_WARNING, "unknown client version %d",
 278                ctx->ClientVersion);
 279          break;
 280       }
 281       break;
 282    case EGL_OPENVG_API:
 283       idx = EGL_G3D_ST_OPENVG;
 284       break;
 285    case EGL_OPENGL_API:
 286       idx = EGL_G3D_ST_OPENGL;
 287       break;
 288    default:
 289       _eglLog(_EGL_WARNING, "unknown client API 0x%04x", ctx->ClientAPI);
 290       break;
 291    }
 292
 293    stapi = (idx >= 0) ? gdrv->stapis[idx] : NULL;
 294    return stapi;
 295 }
 296
 297 /**
 298  * Initialize the state trackers.
 299  */
 300 static void
 301 egl_g3d_init_st(_EGLDriver *drv)
 302 {
 303    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 304    EGLint i;
 305
 306    /* already initialized */
 307    if (gdrv->api_mask)
 308       return;
 309
 310    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
 311       gdrv->stapis[i] = egl_g3d_get_st(i);
 312       if (gdrv->stapis[i])
 313          gdrv->api_mask |= gdrv->stapis[i]->api_bit;
 314    }
 315
 316    if (gdrv->api_mask)
 317       _eglLog(_EGL_DEBUG, "Driver API mask: 0x%x", gdrv->api_mask);
 318    else
 319       _eglLog(_EGL_WARNING, "No supported client API");
 320 }
 321
 322 /**
 323  * Get the probe object of the display.
 324  *
 325  * Note that this function may be called before the display is initialized.
 326  */
 327 static struct native_probe *
 328 egl_g3d_get_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 329 {
 330    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 331    struct native_probe *nprobe;
 332
 333    nprobe = (struct native_probe *) _eglGetProbeCache(gdrv->probe_key);
 334    if (!nprobe || nprobe->display != dpy->NativeDisplay) {
 335       if (nprobe)
 336          nprobe->destroy(nprobe);
 337       nprobe = native_create_probe(dpy->NativeDisplay);
 338       _eglSetProbeCache(gdrv->probe_key, (void *) nprobe);
 339    }
 340
 341    return nprobe;
 342 }
 343
 344 /**
 345  * Destroy the probe object of the display.  The display may be NULL.
 346  *
 347  * Note that this function may be called before the display is initialized.
 348  */
 349 static void
 350 egl_g3d_destroy_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 351 {
 352    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 353    struct native_probe *nprobe;
 354
 355    nprobe = (struct native_probe *) _eglGetProbeCache(gdrv->probe_key);
 356    if (nprobe && (!dpy || nprobe->display == dpy->NativeDisplay)) {
 357       nprobe->destroy(nprobe);
 358       _eglSetProbeCache(gdrv->probe_key, NULL);
 359    }
 360 }
 361
 362 /**
 363  * Return an API mask that consists of the state trackers that supports the
 364  * given mode.
 365  *
 366  * FIXME add st_is_mode_supported()?
 367  */
 368 static EGLint
 369 get_mode_api_mask(const __GLcontextModes *mode, EGLint api_mask)
 370 {
 371    EGLint check;
 372
 373    /* OpenGL ES 1.x and 2.x are checked together */
 374    check = EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT;
 375    if (api_mask & check) {
 376       /* this is required by EGL, not by OpenGL ES */
 377       if (mode->drawableType & GLX_WINDOW_BIT && !mode->doubleBufferMode)
 378          api_mask &= ~check;
 379    }
 380
 381    check = EGL_OPENVG_BIT;
 382    if (api_mask & check) {
 383       /* vega st needs the depth/stencil rb */
 384       if (!mode->depthBits && !mode->stencilBits)
 385          api_mask &= ~check;
 386    }
 387
 388    return api_mask;
 389 }
 390
 391 #ifdef EGL_MESA_screen_surface
 392
 393 static void
 394 egl_g3d_add_screens(_EGLDriver *drv, _EGLDisplay *dpy)
 395 {
 396    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 397    const struct native_connector **native_connectors;
 398    EGLint num_connectors, i;
 399
 400    native_connectors =
 401       gdpy->native->modeset->get_connectors(gdpy->native, &num_connectors, NULL);
 402    if (!num_connectors) {
 403       if (native_connectors)
 404          free(native_connectors);
 405       return;
 406    }
 407
 408    for (i = 0; i < num_connectors; i++) {
 409       const struct native_connector *nconn = native_connectors[i];
 410       struct egl_g3d_screen *gscr;
 411       const struct native_mode **native_modes;
 412       EGLint num_modes, j;
 413
 414       /* TODO support for hotplug */
 415       native_modes =
 416          gdpy->native->modeset->get_modes(gdpy->native, nconn, &num_modes);
 417       if (!num_modes) {
 418          if (native_modes)
 419             free(native_modes);
 420          continue;
 421       }
 422
 423       gscr = CALLOC_STRUCT(egl_g3d_screen);
 424       if (!gscr) {
 425          free(native_modes);
 426          continue;
 427       }
 428
 429       _eglInitScreen(&gscr->base);
 430
 431       for (j = 0; j < num_modes; j++) {
 432          const struct native_mode *nmode = native_modes[j];
 433          _EGLMode *mode;
 434
 435          mode = _eglAddNewMode(&gscr->base, nmode->width, nmode->height,
 436                nmode->refresh_rate, nmode->desc);
 437          if (!mode)
 438             break;
 439          /* gscr->native_modes and gscr->base.Modes should be consistent */
 440          assert(mode == &gscr->base.Modes[j]);
 441       }
 442
 443       gscr->native = nconn;
 444       gscr->native_modes = native_modes;
 445
 446       _eglAddScreen(dpy, &gscr->base);
 447    }
 448
 449    free(native_connectors);
 450 }
 451
 452 #endif /* EGL_MESA_screen_surface */
 453
 454 /**
 455  * Add configs to display and return the next config ID.
 456  */
 457 static EGLint
 458 egl_g3d_add_configs(_EGLDriver *drv, _EGLDisplay *dpy, EGLint id)
 459 {
 460    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 461    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 462    const struct native_config **native_configs;
 463    int num_configs, i;
 464
 465    native_configs = gdpy->native->get_configs(gdpy->native,
 466          &num_configs);
 467    if (!num_configs) {
 468       if (native_configs)
 469          free(native_configs);
 470       return id;
 471    }
 472
 473    for (i = 0; i < num_configs; i++) {
 474       EGLint api_mask;
 475       struct egl_g3d_config *gconf;
 476       EGLBoolean valid;
 477
 478       api_mask = get_mode_api_mask(&native_configs[i]->mode, gdrv->api_mask);
 479       if (!api_mask) {
 480          _eglLog(_EGL_DEBUG, "no state tracker supports config 0x%x",
 481                native_configs[i]->mode.visualID);
 482          continue;
 483       }
 484
 485       gconf = CALLOC_STRUCT(egl_g3d_config);
 486       if (!gconf)
 487          continue;
 488
 489       _eglInitConfig(&gconf->base, id);
 490       valid = _eglConfigFromContextModesRec(&gconf->base,
 491             &native_configs[i]->mode, api_mask, api_mask);
 492       if (valid) {
 493 #ifdef EGL_MESA_screen_surface
 494          /* check if scanout surface bit is set */
 495          if (native_configs[i]->scanout_bit) {
 496             EGLint val = GET_CONFIG_ATTRIB(&gconf->base, EGL_SURFACE_TYPE);
 497             val |= EGL_SCREEN_BIT_MESA;
 498             SET_CONFIG_ATTRIB(&gconf->base, EGL_SURFACE_TYPE, val);
 499          }
 500 #endif
 501          valid = _eglValidateConfig(&gconf->base, EGL_FALSE);
 502       }
 503       if (!valid) {
 504          _eglLog(_EGL_DEBUG, "skip invalid config 0x%x",
 505                native_configs[i]->mode.visualID);
 506          free(gconf);
 507          continue;
 508       }
 509
 510       gconf->native = native_configs[i];
 511       _eglAddConfig(dpy, &gconf->base);
 512       id++;
 513    }
 514
 515    free(native_configs);
 516    return id;
 517 }
 518
 519 /**
 520  * Flush the front buffer of the context's draw surface.
 521  */
 522 static void
 523 egl_g3d_flush_frontbuffer(struct pipe_screen *screen,
 524                           struct pipe_surface *surf, void *context_private)
 525 {
 526    struct egl_g3d_context *gctx = egl_g3d_context(context_private);
 527    struct egl_g3d_surface *gsurf = egl_g3d_surface(gctx->base.DrawSurface);
 528
 529    if (gsurf)
 530       gsurf->native->flush_frontbuffer(gsurf->native);
 531 }
 532
 533 /**
 534  * Re-validate the context.
 535  */
 536 static void
 537 egl_g3d_update_buffer(struct pipe_screen *screen, void *context_private)
 538 {
 539    struct egl_g3d_context *gctx = egl_g3d_context(context_private);
 540
 541    /**
 542     * It is likely that the surface has changed when this function is called.
 543     * Set force_validate to skip an unnecessary check.
 544     */
 545    gctx->force_validate = EGL_TRUE;
 546    egl_g3d_validate_context(gctx->base.Resource.Display, &gctx->base);
 547 }
 548
 549 static EGLBoolean
 550 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 551 {
 552    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 553    EGLint i;
 554
 555    _eglReleaseDisplayResources(drv, dpy);
 556    _eglCleanupDisplay(dpy);
 557
 558    if (dpy->Screens) {
 559       for (i = 0; i < dpy->NumScreens; i++) {
 560          struct egl_g3d_screen *gscr = egl_g3d_screen(dpy->Screens[i]);
 561          free(gscr->native_modes);
 562          free(gscr);
 563       }
 564       free(dpy->Screens);
 565    }
 566
 567    if (gdpy->native)
 568       gdpy->native->destroy(gdpy->native);
 569
 570    free(gdpy);
 571    dpy->DriverData = NULL;
 572
 573    return EGL_TRUE;
 574 }
 575
 576 static EGLBoolean
 577 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 578                    EGLint *major, EGLint *minor)
 579 {
 580    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 581    struct egl_g3d_display *gdpy;
 582
 583    /* the probe object is unlikely to be needed again */
 584    egl_g3d_destroy_probe(drv, dpy);
 585
 586    gdpy = CALLOC_STRUCT(egl_g3d_display);
 587    if (!gdpy) {
 588       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 589       goto fail;
 590    }
 591    dpy->DriverData = gdpy;
 592
 593    gdpy->native = native_create_display(dpy->NativeDisplay);
 594    if (!gdpy->native) {
 595       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 596       goto fail;
 597    }
 598
 599    gdpy->native->screen->flush_frontbuffer = egl_g3d_flush_frontbuffer;
 600    gdpy->native->screen->update_buffer = egl_g3d_update_buffer;
 601
 602    egl_g3d_init_st(&gdrv->base);
 603    dpy->ClientAPIsMask = gdrv->api_mask;
 604
 605    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 606       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 607       goto fail;
 608    }
 609
 610 #ifdef EGL_MESA_screen_surface
 611    /* enable MESA_screen_surface */
 612    if (gdpy->native->modeset) {
 613       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 614       egl_g3d_add_screens(drv, dpy);
 615    }
 616 #endif
 617
 618    *major = 1;
 619    *minor = 4;
 620
 621    return EGL_TRUE;
 622
 623 fail:
 624    if (gdpy)
 625       egl_g3d_terminate(drv, dpy);
 626    return EGL_FALSE;
 627 }
 628
 629 static _EGLContext *
 630 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 631                        _EGLContext *share, const EGLint *attribs)
 632 {
 633    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 634    struct egl_g3d_context *gshare = egl_g3d_context(share);
 635    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 636    struct egl_g3d_context *gctx;
 637    const __GLcontextModes *mode;
 638
 639    gctx = CALLOC_STRUCT(egl_g3d_context);
 640    if (!gctx) {
 641       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 642       return NULL;
 643    }
 644
 645    if (!_eglInitContext(drv, &gctx->base, conf, attribs)) {
 646       free(gctx);
 647       return NULL;
 648    }
 649
 650    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 651    if (!gctx->stapi) {
 652       free(gctx);
 653       return NULL;
 654    }
 655
 656    mode = &gconf->native->mode;
 657    gctx->pipe =
 658       gdpy->native->create_context(gdpy->native, (void *) &gctx->base);
 659    if (!gctx->pipe) {
 660       free(gctx);
 661       return NULL;
 662    }
 663
 664    gctx->st_ctx = gctx->stapi->st_create_context(gctx->pipe, mode,
 665                         (gshare) ? gshare->st_ctx : NULL);
 666    if (!gctx->st_ctx) {
 667       gctx->pipe->destroy(gctx->pipe);
 668       free(gctx);
 669       return NULL;
 670    }
 671
 672    return &gctx->base;
 673 }
 674
 675 /**
 676  * Destroy a context.
 677  */
 678 static void
 679 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 680 {
 681    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 682
 683    /* FIXME a context might live longer than its display */
 684    if (!dpy->Initialized)
 685       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 686
 687    egl_g3d_realloc_context(dpy, &gctx->base);
 688    /* it will destroy the associated pipe context */
 689    gctx->stapi->st_destroy_context(gctx->st_ctx);
 690
 691    free(gctx);
 692 }
 693
 694 static EGLBoolean
 695 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 696 {
 697    if (!_eglIsContextBound(ctx))
 698       destroy_context(dpy, ctx);
 699    return EGL_TRUE;
 700 }
 701
 702 static EGLBoolean
 703 init_surface_geometry(_EGLSurface *surf)
 704 {
 705    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 706
 707    return gsurf->native->validate(gsurf->native, 0x0,
 708          &gsurf->sequence_number, NULL,
 709          &gsurf->base.Width, &gsurf->base.Height);
 710 }
 711
 712 static _EGLSurface *
 713 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 714                               _EGLConfig *conf, EGLNativeWindowType win,
 715                               const EGLint *attribs)
 716 {
 717    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 718    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 719    struct egl_g3d_surface *gsurf;
 720
 721    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 722    if (!gsurf) {
 723       _eglError(EGL_BAD_ALLOC, "eglCreateWindowSurface");
 724       return NULL;
 725    }
 726
 727    if (!_eglInitSurface(drv, &gsurf->base, EGL_WINDOW_BIT, conf, attribs)) {
 728       free(gsurf);
 729       return NULL;
 730    }
 731
 732    gsurf->native =
 733       gdpy->native->create_window_surface(gdpy->native, win, gconf->native);
 734    if (!gsurf->native) {
 735       free(gsurf);
 736       return NULL;
 737    }
 738
 739    if (!init_surface_geometry(&gsurf->base)) {
 740       gsurf->native->destroy(gsurf->native);
 741       free(gsurf);
 742       return NULL;
 743    }
 744
 745    gsurf->render_att = (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER ||
 746                         !gconf->native->mode.doubleBufferMode) ?
 747       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 748
 749    return &gsurf->base;
 750 }
 751
 752 static _EGLSurface *
 753 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 754                               _EGLConfig *conf, EGLNativePixmapType pix,
 755                               const EGLint *attribs)
 756 {
 757    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 758    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 759    struct egl_g3d_surface *gsurf;
 760
 761    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 762    if (!gsurf) {
 763       _eglError(EGL_BAD_ALLOC, "eglCreatePixmapSurface");
 764       return NULL;
 765    }
 766
 767    if (!_eglInitSurface(drv, &gsurf->base, EGL_PIXMAP_BIT, conf, attribs)) {
 768       free(gsurf);
 769       return NULL;
 770    }
 771
 772    gsurf->native =
 773       gdpy->native->create_pixmap_surface(gdpy->native, pix, gconf->native);
 774    if (!gsurf->native) {
 775       free(gsurf);
 776       return NULL;
 777    }
 778
 779    if (!init_surface_geometry(&gsurf->base)) {
 780       gsurf->native->destroy(gsurf->native);
 781       free(gsurf);
 782       return NULL;
 783    }
 784
 785    gsurf->render_att = NATIVE_ATTACHMENT_FRONT_LEFT;
 786
 787    return &gsurf->base;
 788 }
 789
 790 static _EGLSurface *
 791 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 792                                _EGLConfig *conf, const EGLint *attribs)
 793 {
 794    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 795    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 796    struct egl_g3d_surface *gsurf;
 797
 798    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 799    if (!gsurf) {
 800       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
 801       return NULL;
 802    }
 803
 804    if (!_eglInitSurface(drv, &gsurf->base, EGL_PBUFFER_BIT, conf, attribs)) {
 805       free(gsurf);
 806       return NULL;
 807    }
 808
 809    gsurf->native =
 810       gdpy->native->create_pbuffer_surface(gdpy->native, gconf->native,
 811             gsurf->base.Width, gsurf->base.Height);
 812    if (!gsurf->native) {
 813       free(gsurf);
 814       return NULL;
 815    }
 816
 817    if (!init_surface_geometry(&gsurf->base)) {
 818       gsurf->native->destroy(gsurf->native);
 819       free(gsurf);
 820       return NULL;
 821    }
 822
 823    gsurf->render_att = (!gconf->native->mode.doubleBufferMode) ?
 824       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 825
 826    return &gsurf->base;
 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_context *old_gctx;
 860    EGLint api;
 861    EGLBoolean ok = EGL_TRUE;
 862
 863    /* find the old context */
 864    api = (gctx) ? gctx->base.ClientAPI : eglQueryAPI();
 865    old_gctx = egl_g3d_get_current_context(api);
 866    if (old_gctx && !_eglIsContextLinked(&old_gctx->base))
 867          old_gctx = NULL;
 868
 869    if (!_eglMakeCurrent(drv, dpy, draw, read, ctx))
 870       return EGL_FALSE;
 871
 872    if (old_gctx) {
 873       /* flush old context */
 874       old_gctx->stapi->st_flush(old_gctx->st_ctx,
 875             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 876
 877       /*
 878        * The old context is no longer current, and egl_g3d_realloc_context()
 879        * should be called to destroy the framebuffers.  However, it is possible
 880        * that it will be made current again with the same draw/read surfaces.
 881        * It might be better to keep it around.
 882        */
 883    }
 884
 885    if (gctx) {
 886       struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 887
 888       ok = egl_g3d_realloc_context(dpy, &gctx->base);
 889       if (ok) {
 890          ok = gctx->stapi->st_make_current(gctx->st_ctx,
 891                gctx->draw.st_fb, gctx->read.st_fb);
 892          if (ok) {
 893             egl_g3d_validate_context(dpy, &gctx->base);
 894             if (gdraw->base.Type == EGL_WINDOW_BIT) {
 895                gctx->base.WindowRenderBuffer =
 896                   (gdraw->render_att == NATIVE_ATTACHMENT_FRONT_LEFT) ?
 897                   EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 898             }
 899          }
 900       }
 901    }
 902    else if (old_gctx) {
 903       ok = old_gctx->stapi->st_make_current(NULL, NULL, NULL);
 904       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 905    }
 906
 907    return ok;
 908 }
 909
 910 static EGLBoolean
 911 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 912 {
 913    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 914    _EGLContext *ctx = _eglGetCurrentContext();
 915    struct egl_g3d_context *gctx = NULL;
 916
 917    /* no-op for pixmap or pbuffer surface */
 918    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 919        gsurf->base.Type == EGL_PBUFFER_BIT)
 920       return EGL_TRUE;
 921
 922    /* or when the surface is single-buffered */
 923    if (gsurf->render_att == NATIVE_ATTACHMENT_FRONT_LEFT)
 924       return EGL_TRUE;
 925
 926    if (ctx && ctx->DrawSurface == surf)
 927       gctx = egl_g3d_context(ctx);
 928
 929    /* flush if the surface is current */
 930    if (gctx)
 931       gctx->stapi->st_notify_swapbuffers(gctx->draw.st_fb);
 932
 933    /*
 934     * We drew on the back buffer, unless there was no back buffer.
 935     * In that case, we drew on the front buffer.  Either case, we call
 936     * swap_buffers.
 937     */
 938    if (!gsurf->native->swap_buffers(gsurf->native))
 939       return EGL_FALSE;
 940
 941    if (gctx) {
 942       struct egl_g3d_config *gconf = egl_g3d_config(gsurf->base.Config);
 943
 944       /* force validation if the swap method is not copy */
 945       if (gconf->native->mode.swapMethod != GLX_SWAP_COPY_OML) {
 946          gctx->force_validate = EGL_TRUE;
 947          egl_g3d_validate_context(dpy, &gctx->base);
 948       }
 949    }
 950
 951    return EGL_TRUE;
 952 }
 953
 954 /**
 955  * Find a config that supports the pixmap.
 956  */
 957 static _EGLConfig *
 958 find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 959 {
 960    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 961    struct egl_g3d_config *gconf;
 962    EGLint i;
 963
 964    for (i = 0; i < dpy->NumConfigs; i++) {
 965       gconf = egl_g3d_config(dpy->Configs[i]);
 966       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 967          break;
 968    }
 969
 970    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 971 }
 972
 973 /**
 974  * Get the pipe surface of the given attachment of the native surface.
 975  */
 976 static struct pipe_surface *
 977 get_pipe_surface(struct native_display *ndpy, struct native_surface *nsurf,
 978                  enum native_attachment natt)
 979 {
 980    struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
 981    struct pipe_surface *psurf;
 982
 983    textures[natt] = NULL;
 984    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 985    if (!textures[natt])
 986       return NULL;
 987
 988    psurf = ndpy->screen->get_tex_surface(ndpy->screen, textures[natt],
 989          0, 0, 0, PIPE_BUFFER_USAGE_CPU_WRITE);
 990    pipe_texture_reference(&textures[natt], NULL);
 991
 992    return psurf;
 993 }
 994
 995 static EGLBoolean
 996 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 997                      EGLNativePixmapType target)
 998 {
 999    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1000    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1001    _EGLContext *ctx = _eglGetCurrentContext();
1002    struct egl_g3d_config *gconf;
1003    struct native_surface *nsurf;
1004    struct pipe_screen *screen = gdpy->native->screen;
1005    struct pipe_surface *psurf;
1006
1007    if (!gsurf->render_surface)
1008       return EGL_TRUE;
1009
1010    gconf = egl_g3d_config(find_pixmap_config(dpy, target));
1011    if (!gconf)
1012       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1013
1014    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
1015          target, gconf->native);
1016    if (!nsurf)
1017       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1018
1019    /* flush if the surface is current */
1020    if (ctx && ctx->DrawSurface == &gsurf->base) {
1021       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1022       gctx->stapi->st_flush(gctx->st_ctx,
1023             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1024    }
1025
1026    psurf = get_pipe_surface(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
1027    if (psurf) {
1028       struct pipe_context pipe;
1029
1030       /**
1031        * XXX This is hacky.  If we might allow the EGLDisplay to create a pipe
1032        * context of its own and use the blitter context for this.
1033        */
1034       memset(&pipe, 0, sizeof(pipe));
1035       pipe.screen = screen;
1036
1037       util_surface_copy(&pipe, FALSE, psurf, 0, 0,
1038             gsurf->render_surface, 0, 0, psurf->width, psurf->height);
1039
1040       pipe_surface_reference(&psurf, NULL);
1041       nsurf->flush_frontbuffer(nsurf);
1042    }
1043
1044    nsurf->destroy(nsurf);
1045
1046    return EGL_TRUE;
1047 }
1048
1049 static EGLBoolean
1050 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
1051 {
1052    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1053    gctx->stapi->st_finish(gctx->st_ctx);
1054    return EGL_TRUE;
1055 }
1056
1057 static EGLBoolean
1058 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
1059 {
1060    _EGLContext *ctx = _eglGetCurrentContext();
1061
1062    if (engine != EGL_CORE_NATIVE_ENGINE)
1063       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
1064
1065    if (ctx && ctx->DrawSurface) {
1066       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
1067       gsurf->native->wait(gsurf->native);
1068    }
1069
1070    return EGL_TRUE;
1071 }
1072
1073 static _EGLProc
1074 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
1075 {
1076    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1077    _EGLProc proc;
1078    EGLint i;
1079
1080    /* in case this is called before a display is initialized */
1081    egl_g3d_init_st(&gdrv->base);
1082
1083    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
1084       const struct egl_g3d_st *stapi = gdrv->stapis[i];
1085       if (stapi) {
1086          proc = (_EGLProc) stapi->st_get_proc_address(procname);
1087          if (proc)
1088             return proc;
1089       }
1090    }
1091
1092    return (_EGLProc) NULL;
1093 }
1094
1095 static EGLBoolean
1096 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1097                        _EGLSurface *surf, EGLint buffer)
1098 {
1099    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1100    struct egl_g3d_context *gctx;
1101    enum pipe_format target_format;
1102    int target;
1103
1104    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
1105       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
1106    if (buffer != EGL_BACK_BUFFER)
1107       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
1108    if (gsurf->base.BoundToTexture)
1109       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
1110
1111    switch (gsurf->base.TextureFormat) {
1112    case EGL_TEXTURE_RGB:
1113       target_format = PIPE_FORMAT_R8G8B8_UNORM;
1114       break;
1115    case EGL_TEXTURE_RGBA:
1116       target_format = PIPE_FORMAT_A8R8G8B8_UNORM;
1117       break;
1118    default:
1119       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1120    }
1121
1122    switch (gsurf->base.TextureTarget) {
1123    case EGL_TEXTURE_2D:
1124       target = ST_TEXTURE_2D;
1125       break;
1126    default:
1127       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1128    }
1129
1130    /* flush properly if the surface is bound */
1131    if (gsurf->base.Binding) {
1132       gctx = egl_g3d_context(gsurf->base.Binding);
1133       gctx->stapi->st_flush(gctx->st_ctx,
1134             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1135    }
1136
1137    /* XXX change to EGL_OPENGL_ES_API once OpenGL ES is merged */
1138    gctx = egl_g3d_get_current_context(EGL_OPENGL_API);
1139    if (gctx) {
1140       if (!gsurf->render_surface)
1141          return EGL_FALSE;
1142
1143       gctx->stapi->st_bind_texture_surface(gsurf->render_surface,
1144             target, gsurf->base.MipmapLevel, target_format);
1145       gsurf->base.BoundToTexture = EGL_TRUE;
1146    }
1147
1148    return EGL_TRUE;
1149 }
1150
1151 static EGLBoolean
1152 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1153                           _EGLSurface *surf, EGLint buffer)
1154 {
1155    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1156
1157    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
1158        !gsurf->base.BoundToTexture)
1159       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
1160    if (buffer != EGL_BACK_BUFFER)
1161       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
1162
1163    if (gsurf->render_surface) {
1164       _EGLThreadInfo *t = _eglGetCurrentThread();
1165       /* XXX change to EGL_OPENGL_ES_API once OpenGL ES is merged */
1166       struct egl_g3d_context *gctx = egl_g3d_context(
1167             t->CurrentContexts[_eglConvertApiToIndex(EGL_OPENGL_API)]);
1168
1169       /* what if the context the surface binds to is no longer current? */
1170       if (gctx)
1171          gctx->stapi->st_unbind_texture_surface(gsurf->render_surface,
1172                ST_TEXTURE_2D, gsurf->base.MipmapLevel);
1173    }
1174
1175    gsurf->base.BoundToTexture = EGL_FALSE;
1176
1177    return EGL_TRUE;
1178 }
1179
1180 #ifdef EGL_MESA_screen_surface
1181
1182 static _EGLSurface *
1183 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1184                               _EGLConfig *conf, const EGLint *attribs)
1185 {
1186    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1187    struct egl_g3d_config *gconf = egl_g3d_config(conf);
1188    struct egl_g3d_surface *gsurf;
1189
1190    gsurf = CALLOC_STRUCT(egl_g3d_surface);
1191    if (!gsurf) {
1192       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
1193       return NULL;
1194    }
1195
1196    if (!_eglInitSurface(drv, &gsurf->base,
1197             EGL_SCREEN_BIT_MESA, conf, attribs)) {
1198       free(gsurf);
1199       return NULL;
1200    }
1201
1202    gsurf->native =
1203       gdpy->native->modeset->create_scanout_surface(gdpy->native,
1204             gconf->native, gsurf->base.Width, gsurf->base.Height);
1205    if (!gsurf->native) {
1206       free(gsurf);
1207       return NULL;
1208    }
1209
1210    gsurf->render_att = (!gconf->native->mode.doubleBufferMode) ?
1211       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
1212
1213    return &gsurf->base;
1214 }
1215
1216 static EGLBoolean
1217 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1218                             _EGLScreen *scr, _EGLSurface *surf,
1219                             _EGLMode *mode)
1220 {
1221    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1222    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
1223    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1224    struct native_surface *nsurf;
1225    const struct native_mode *nmode;
1226    EGLBoolean changed;
1227
1228    if (gsurf) {
1229       EGLint idx;
1230
1231       if (!mode)
1232          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1233       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
1234          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
1235       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
1236          return _eglError(EGL_BAD_MATCH,
1237                "eglShowSurfaceMESA(surface smaller than mode size)");
1238
1239       /* find the index of the mode */
1240       for (idx = 0; idx < gscr->base.NumModes; idx++)
1241          if (mode == &gscr->base.Modes[idx])
1242             break;
1243       if (idx >= gscr->base.NumModes) {
1244          return _eglError(EGL_BAD_MODE_MESA,
1245                "eglShowSurfaceMESA(unknown mode)");
1246       }
1247
1248       nsurf = gsurf->native;
1249       nmode = gscr->native_modes[idx];
1250    }
1251    else {
1252       if (mode)
1253          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1254
1255       /* disable the screen */
1256       nsurf = NULL;
1257       nmode = NULL;
1258    }
1259
1260    /* TODO surface panning by CRTC choosing */
1261    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
1262          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
1263    if (changed) {
1264       gscr->base.CurrentSurface = &gsurf->base;
1265       gscr->base.CurrentMode = mode;
1266    }
1267
1268    return changed;
1269 }
1270
1271 #endif /* EGL_MESA_screen_surface */
1272
1273 static EGLint
1274 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
1275 {
1276    struct native_probe *nprobe;
1277    enum native_probe_result res;
1278    EGLint score;
1279
1280    nprobe = egl_g3d_get_probe(drv, dpy);
1281    res = native_get_probe_result(nprobe);
1282
1283    switch (res) {
1284    case NATIVE_PROBE_UNKNOWN:
1285    default:
1286       score = 0;
1287       break;
1288    case NATIVE_PROBE_FALLBACK:
1289       score = 40;
1290       break;
1291    case NATIVE_PROBE_SUPPORTED:
1292       score = 50;
1293       break;
1294    case NATIVE_PROBE_EXACT:
1295       score = 100;
1296       break;
1297    }
1298
1299    return score;
1300 }
1301
1302 static void
1303 egl_g3d_unload(_EGLDriver *drv)
1304 {
1305    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1306
1307    egl_g3d_destroy_probe(drv, NULL);
1308    free(gdrv);
1309 }
1310
1311 _EGLDriver *
1312 _eglMain(const char *args)
1313 {
1314    static char driver_name[64];
1315    struct egl_g3d_driver *gdrv;
1316
1317    snprintf(driver_name, sizeof(driver_name),
1318          "Gallium/%s", native_get_name());
1319
1320    gdrv = CALLOC_STRUCT(egl_g3d_driver);
1321    if (!gdrv)
1322       return NULL;
1323
1324    _eglInitDriverFallbacks(&gdrv->base);
1325
1326    gdrv->base.API.Initialize = egl_g3d_initialize;
1327    gdrv->base.API.Terminate = egl_g3d_terminate;
1328    gdrv->base.API.CreateContext = egl_g3d_create_context;
1329    gdrv->base.API.DestroyContext = egl_g3d_destroy_context;
1330    gdrv->base.API.CreateWindowSurface = egl_g3d_create_window_surface;
1331    gdrv->base.API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
1332    gdrv->base.API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
1333    gdrv->base.API.DestroySurface = egl_g3d_destroy_surface;
1334    gdrv->base.API.MakeCurrent = egl_g3d_make_current;
1335    gdrv->base.API.SwapBuffers = egl_g3d_swap_buffers;
1336    gdrv->base.API.CopyBuffers = egl_g3d_copy_buffers;
1337    gdrv->base.API.WaitClient = egl_g3d_wait_client;
1338    gdrv->base.API.WaitNative = egl_g3d_wait_native;
1339    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
1340
1341    gdrv->base.API.BindTexImage = egl_g3d_bind_tex_image;
1342    gdrv->base.API.ReleaseTexImage = egl_g3d_release_tex_image;
1343
1344 #ifdef EGL_MESA_screen_surface
1345    gdrv->base.API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
1346    gdrv->base.API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
1347 #endif
1348
1349    gdrv->base.Name = driver_name;
1350    gdrv->base.Probe = egl_g3d_probe;
1351    gdrv->base.Unload = egl_g3d_unload;
1352
1353    /* the key is " EGL G3D" */
1354    gdrv->probe_key = 0x0E61063D;
1355
1356    return &gdrv->base;
1357 }