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 void
 535 egl_g3d_invalid_surface(struct native_display *ndpy,
 536                         struct native_surface *nsurf,
 537                         unsigned int seq_num)
 538 {
 539    /* XXX not thread safe? */
 540    struct egl_g3d_surface *gsurf = egl_g3d_surface(nsurf->user_data);
 541    struct egl_g3d_context *gctx = egl_g3d_context(gsurf->base.CurrentContext);
 542
 543    /* set force_validate to skip an unnecessary check */
 544    if (gctx)
 545       gctx->force_validate = TRUE;
 546 }
 547
 548 static struct native_event_handler egl_g3d_native_event_handler = {
 549    .invalid_surface = egl_g3d_invalid_surface
 550 };
 551
 552 static EGLBoolean
 553 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 554 {
 555    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 556    EGLint i;
 557
 558    _eglReleaseDisplayResources(drv, dpy);
 559    _eglCleanupDisplay(dpy);
 560
 561    if (dpy->Screens) {
 562       for (i = 0; i < dpy->NumScreens; i++) {
 563          struct egl_g3d_screen *gscr = egl_g3d_screen(dpy->Screens[i]);
 564          free(gscr->native_modes);
 565          free(gscr);
 566       }
 567       free(dpy->Screens);
 568    }
 569
 570    if (gdpy->native)
 571       gdpy->native->destroy(gdpy->native);
 572
 573    free(gdpy);
 574    dpy->DriverData = NULL;
 575
 576    return EGL_TRUE;
 577 }
 578
 579 static EGLBoolean
 580 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 581                    EGLint *major, EGLint *minor)
 582 {
 583    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 584    struct egl_g3d_display *gdpy;
 585
 586    /* the probe object is unlikely to be needed again */
 587    egl_g3d_destroy_probe(drv, dpy);
 588
 589    gdpy = CALLOC_STRUCT(egl_g3d_display);
 590    if (!gdpy) {
 591       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 592       goto fail;
 593    }
 594    dpy->DriverData = gdpy;
 595
 596    gdpy->native = native_create_display(dpy->NativeDisplay,
 597          &egl_g3d_native_event_handler);
 598    if (!gdpy->native) {
 599       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 600       goto fail;
 601    }
 602
 603    gdpy->native->user_data = (void *) dpy;
 604    gdpy->native->screen->flush_frontbuffer = egl_g3d_flush_frontbuffer;
 605    gdpy->native->screen->update_buffer = egl_g3d_update_buffer;
 606
 607    egl_g3d_init_st(&gdrv->base);
 608    dpy->ClientAPIsMask = gdrv->api_mask;
 609
 610 #ifdef EGL_MESA_screen_surface
 611    /* enable MESA_screen_surface before adding (and validating) configs */
 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    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 619       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 620       goto fail;
 621    }
 622
 623    *major = 1;
 624    *minor = 4;
 625
 626    return EGL_TRUE;
 627
 628 fail:
 629    if (gdpy)
 630       egl_g3d_terminate(drv, dpy);
 631    return EGL_FALSE;
 632 }
 633
 634 static _EGLContext *
 635 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 636                        _EGLContext *share, const EGLint *attribs)
 637 {
 638    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 639    struct egl_g3d_context *gshare = egl_g3d_context(share);
 640    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 641    struct egl_g3d_context *gctx;
 642    const __GLcontextModes *mode;
 643
 644    gctx = CALLOC_STRUCT(egl_g3d_context);
 645    if (!gctx) {
 646       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 647       return NULL;
 648    }
 649
 650    if (!_eglInitContext(&gctx->base, dpy, conf, attribs)) {
 651       free(gctx);
 652       return NULL;
 653    }
 654
 655    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 656    if (!gctx->stapi) {
 657       free(gctx);
 658       return NULL;
 659    }
 660
 661    mode = &gconf->native->mode;
 662
 663    gctx->pipe = gdpy->native->screen->context_create(
 664       gdpy->native->screen,
 665       (void *) &gctx->base);
 666
 667    if (!gctx->pipe) {
 668       free(gctx);
 669       return NULL;
 670    }
 671
 672    gctx->st_ctx = gctx->stapi->st_create_context(gctx->pipe, mode,
 673                         (gshare) ? gshare->st_ctx : NULL);
 674    if (!gctx->st_ctx) {
 675       gctx->pipe->destroy(gctx->pipe);
 676       free(gctx);
 677       return NULL;
 678    }
 679
 680    return &gctx->base;
 681 }
 682
 683 /**
 684  * Destroy a context.
 685  */
 686 static void
 687 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 688 {
 689    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 690
 691    /* FIXME a context might live longer than its display */
 692    if (!dpy->Initialized)
 693       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 694
 695    egl_g3d_realloc_context(dpy, &gctx->base);
 696    /* it will destroy the associated pipe context */
 697    gctx->stapi->st_destroy_context(gctx->st_ctx);
 698
 699    free(gctx);
 700 }
 701
 702 static EGLBoolean
 703 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 704 {
 705    if (!_eglIsContextBound(ctx))
 706       destroy_context(dpy, ctx);
 707    return EGL_TRUE;
 708 }
 709
 710 struct egl_g3d_create_surface_arg {
 711    EGLint type;
 712    union {
 713       EGLNativeWindowType win;
 714       EGLNativePixmapType pix;
 715    } u;
 716 };
 717
 718 static _EGLSurface *
 719 egl_g3d_create_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 720                        struct egl_g3d_create_surface_arg *arg,
 721                        const EGLint *attribs)
 722 {
 723    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 724    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 725    struct egl_g3d_surface *gsurf;
 726    struct native_surface *nsurf;
 727    const char *err;
 728
 729    switch (arg->type) {
 730    case EGL_WINDOW_BIT:
 731       err = "eglCreateWindowSurface";
 732       break;
 733    case EGL_PIXMAP_BIT:
 734       err = "eglCreatePixmapSurface";
 735       break;
 736    case EGL_PBUFFER_BIT:
 737       err = "eglCreatePBufferSurface";
 738       break;
 739 #ifdef EGL_MESA_screen_surface
 740    case EGL_SCREEN_BIT_MESA:
 741       err = "eglCreateScreenSurface";
 742       break;
 743 #endif
 744    default:
 745       err = "eglCreateUnknownSurface";
 746       break;
 747    }
 748
 749    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 750    if (!gsurf) {
 751       _eglError(EGL_BAD_ALLOC, err);
 752       return NULL;
 753    }
 754
 755    if (!_eglInitSurface(&gsurf->base, dpy, arg->type, conf, attribs)) {
 756       free(gsurf);
 757       return NULL;
 758    }
 759
 760    /* create the native surface */
 761    switch (arg->type) {
 762    case EGL_WINDOW_BIT:
 763       nsurf = gdpy->native->create_window_surface(gdpy->native,
 764             arg->u.win, gconf->native);
 765       break;
 766    case EGL_PIXMAP_BIT:
 767       nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 768             arg->u.pix, gconf->native);
 769       break;
 770    case EGL_PBUFFER_BIT:
 771       nsurf = gdpy->native->create_pbuffer_surface(gdpy->native,
 772             gconf->native, gsurf->base.Width, gsurf->base.Height);
 773       break;
 774 #ifdef EGL_MESA_screen_surface
 775    case EGL_SCREEN_BIT_MESA:
 776       /* prefer back buffer (move to _eglInitSurface?) */
 777       gsurf->base.RenderBuffer = EGL_BACK_BUFFER;
 778       nsurf = gdpy->native->modeset->create_scanout_surface(gdpy->native,
 779             gconf->native, gsurf->base.Width, gsurf->base.Height);
 780       break;
 781 #endif
 782    default:
 783       nsurf = NULL;
 784       break;
 785    }
 786
 787    if (!nsurf) {
 788       free(gsurf);
 789       return NULL;
 790    }
 791    /* initialize the geometry */
 792    if (!nsurf->validate(nsurf, 0x0, &gsurf->sequence_number, NULL,
 793             &gsurf->base.Width, &gsurf->base.Height)) {
 794       nsurf->destroy(nsurf);
 795       free(gsurf);
 796       return NULL;
 797    }
 798
 799    nsurf->user_data = &gsurf->base;
 800    gsurf->native = nsurf;
 801
 802    gsurf->render_att = (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER) ?
 803       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 804    if (!gconf->native->mode.doubleBufferMode)
 805       gsurf->render_att = NATIVE_ATTACHMENT_FRONT_LEFT;
 806
 807    return &gsurf->base;
 808 }
 809
 810 static _EGLSurface *
 811 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 812                               _EGLConfig *conf, EGLNativeWindowType win,
 813                               const EGLint *attribs)
 814 {
 815    struct egl_g3d_create_surface_arg arg;
 816
 817    memset(&arg, 0, sizeof(arg));
 818    arg.type = EGL_WINDOW_BIT;
 819    arg.u.win = win;
 820
 821    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 822 }
 823
 824 static _EGLSurface *
 825 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 826                               _EGLConfig *conf, EGLNativePixmapType pix,
 827                               const EGLint *attribs)
 828 {
 829    struct egl_g3d_create_surface_arg arg;
 830
 831    memset(&arg, 0, sizeof(arg));
 832    arg.type = EGL_PIXMAP_BIT;
 833    arg.u.pix = pix;
 834
 835    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 836 }
 837
 838 static _EGLSurface *
 839 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 840                                _EGLConfig *conf, const EGLint *attribs)
 841 {
 842    struct egl_g3d_create_surface_arg arg;
 843
 844    memset(&arg, 0, sizeof(arg));
 845    arg.type = EGL_PBUFFER_BIT;
 846
 847    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 848 }
 849
 850 /**
 851  * Destroy a surface.
 852  */
 853 static void
 854 destroy_surface(_EGLDisplay *dpy, _EGLSurface *surf)
 855 {
 856    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 857
 858    /* FIXME a surface might live longer than its display */
 859    if (!dpy->Initialized)
 860       _eglLog(_EGL_FATAL, "destroy a surface with an unitialized display");
 861
 862    pipe_surface_reference(&gsurf->render_surface, NULL);
 863    gsurf->native->destroy(gsurf->native);
 864    free(gsurf);
 865 }
 866
 867 static EGLBoolean
 868 egl_g3d_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 869 {
 870    if (!_eglIsSurfaceBound(surf))
 871       destroy_surface(dpy, surf);
 872    return EGL_TRUE;
 873 }
 874
 875 static EGLBoolean
 876 egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
 877                      _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx)
 878 {
 879    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 880    struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 881    struct egl_g3d_context *old_gctx;
 882    EGLBoolean ok = EGL_TRUE;
 883
 884    /* bind the new context and return the "orphaned" one */
 885    if (!_eglBindContext(&ctx, &draw, &read))
 886       return EGL_FALSE;
 887    old_gctx = egl_g3d_context(ctx);
 888
 889    if (old_gctx) {
 890       /* flush old context */
 891       old_gctx->stapi->st_flush(old_gctx->st_ctx,
 892             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 893
 894       /*
 895        * The old context is no longer current, and egl_g3d_realloc_context()
 896        * should be called to destroy the framebuffers.  However, it is possible
 897        * that it will be made current again with the same draw/read surfaces.
 898        * It might be better to keep it around.
 899        */
 900    }
 901
 902    if (gctx) {
 903       ok = egl_g3d_realloc_context(dpy, &gctx->base);
 904       if (ok) {
 905          ok = gctx->stapi->st_make_current(gctx->st_ctx,
 906                gctx->draw.st_fb, gctx->read.st_fb);
 907          if (ok) {
 908             egl_g3d_validate_context(dpy, &gctx->base);
 909             if (gdraw->base.Type == EGL_WINDOW_BIT) {
 910                gctx->base.WindowRenderBuffer =
 911                   (gdraw->render_att == NATIVE_ATTACHMENT_FRONT_LEFT) ?
 912                   EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 913             }
 914          }
 915       }
 916    }
 917    else if (old_gctx) {
 918       ok = old_gctx->stapi->st_make_current(NULL, NULL, NULL);
 919       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 920    }
 921
 922    if (ctx && !_eglIsContextLinked(ctx))
 923       destroy_context(dpy, ctx);
 924    if (draw && !_eglIsSurfaceLinked(draw))
 925       destroy_surface(dpy, draw);
 926    if (read && read != draw && !_eglIsSurfaceLinked(read))
 927       destroy_surface(dpy, read);
 928
 929    return ok;
 930 }
 931
 932 static EGLBoolean
 933 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 934 {
 935    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 936    _EGLContext *ctx = _eglGetCurrentContext();
 937    struct egl_g3d_context *gctx = NULL;
 938
 939    /* no-op for pixmap or pbuffer surface */
 940    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 941        gsurf->base.Type == EGL_PBUFFER_BIT)
 942       return EGL_TRUE;
 943
 944    /* or when the surface is single-buffered */
 945    if (gsurf->render_att == NATIVE_ATTACHMENT_FRONT_LEFT)
 946       return EGL_TRUE;
 947
 948    if (ctx && ctx->DrawSurface == surf)
 949       gctx = egl_g3d_context(ctx);
 950
 951    /* flush if the surface is current */
 952    if (gctx)
 953       gctx->stapi->st_notify_swapbuffers(gctx->draw.st_fb);
 954
 955    return gsurf->native->swap_buffers(gsurf->native);
 956 }
 957
 958 /**
 959  * Find a config that supports the pixmap.
 960  */
 961 static _EGLConfig *
 962 find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 963 {
 964    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 965    struct egl_g3d_config *gconf;
 966    EGLint i;
 967
 968    for (i = 0; i < dpy->NumConfigs; i++) {
 969       gconf = egl_g3d_config(dpy->Configs[i]);
 970       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 971          break;
 972    }
 973
 974    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 975 }
 976
 977 /**
 978  * Get the pipe surface of the given attachment of the native surface.
 979  */
 980 static struct pipe_surface *
 981 get_pipe_surface(struct native_display *ndpy, struct native_surface *nsurf,
 982                  enum native_attachment natt)
 983 {
 984    struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
 985    struct pipe_surface *psurf;
 986
 987    textures[natt] = NULL;
 988    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 989    if (!textures[natt])
 990       return NULL;
 991
 992    psurf = ndpy->screen->get_tex_surface(ndpy->screen, textures[natt],
 993          0, 0, 0, PIPE_BUFFER_USAGE_CPU_WRITE);
 994    pipe_texture_reference(&textures[natt], NULL);
 995
 996    return psurf;
 997 }
 998
 999 static EGLBoolean
1000 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
1001                      EGLNativePixmapType target)
1002 {
1003    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1004    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1005    _EGLContext *ctx = _eglGetCurrentContext();
1006    struct egl_g3d_config *gconf;
1007    struct native_surface *nsurf;
1008    struct pipe_screen *screen = gdpy->native->screen;
1009    struct pipe_surface *psurf;
1010
1011    if (!gsurf->render_surface)
1012       return EGL_TRUE;
1013
1014    gconf = egl_g3d_config(find_pixmap_config(dpy, target));
1015    if (!gconf)
1016       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1017
1018    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
1019          target, gconf->native);
1020    if (!nsurf)
1021       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1022
1023    /* flush if the surface is current */
1024    if (ctx && ctx->DrawSurface == &gsurf->base) {
1025       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1026       gctx->stapi->st_flush(gctx->st_ctx,
1027             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1028    }
1029
1030    psurf = get_pipe_surface(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
1031    if (psurf) {
1032       struct pipe_context pipe;
1033
1034       /**
1035        * XXX This is hacky.  If we might allow the EGLDisplay to create a pipe
1036        * context of its own and use the blitter context for this.
1037        */
1038       memset(&pipe, 0, sizeof(pipe));
1039       pipe.screen = screen;
1040
1041       util_surface_copy(&pipe, FALSE, psurf, 0, 0,
1042             gsurf->render_surface, 0, 0, psurf->width, psurf->height);
1043
1044       pipe_surface_reference(&psurf, NULL);
1045       nsurf->flush_frontbuffer(nsurf);
1046    }
1047
1048    nsurf->destroy(nsurf);
1049
1050    return EGL_TRUE;
1051 }
1052
1053 static EGLBoolean
1054 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
1055 {
1056    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1057    gctx->stapi->st_finish(gctx->st_ctx);
1058    return EGL_TRUE;
1059 }
1060
1061 static EGLBoolean
1062 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
1063 {
1064    _EGLContext *ctx = _eglGetCurrentContext();
1065
1066    if (engine != EGL_CORE_NATIVE_ENGINE)
1067       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
1068
1069    if (ctx && ctx->DrawSurface) {
1070       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
1071       gsurf->native->wait(gsurf->native);
1072    }
1073
1074    return EGL_TRUE;
1075 }
1076
1077 static _EGLProc
1078 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
1079 {
1080    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1081    _EGLProc proc;
1082    EGLint i;
1083
1084    /* in case this is called before a display is initialized */
1085    egl_g3d_init_st(&gdrv->base);
1086
1087    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
1088       const struct egl_g3d_st *stapi = gdrv->stapis[i];
1089       if (stapi) {
1090          proc = (_EGLProc) stapi->st_get_proc_address(procname);
1091          if (proc)
1092             return proc;
1093       }
1094    }
1095
1096    return (_EGLProc) NULL;
1097 }
1098
1099 static EGLBoolean
1100 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1101                        _EGLSurface *surf, EGLint buffer)
1102 {
1103    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1104    _EGLContext *es1 = _eglGetAPIContext(EGL_OPENGL_ES_API);
1105    struct egl_g3d_context *gctx;
1106    enum pipe_format target_format;
1107    int target;
1108
1109    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
1110       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
1111    if (buffer != EGL_BACK_BUFFER)
1112       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
1113    if (gsurf->base.BoundToTexture)
1114       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
1115
1116    switch (gsurf->base.TextureFormat) {
1117    case EGL_TEXTURE_RGB:
1118       target_format = PIPE_FORMAT_R8G8B8_UNORM;
1119       break;
1120    case EGL_TEXTURE_RGBA:
1121       target_format = PIPE_FORMAT_B8G8R8A8_UNORM;
1122       break;
1123    default:
1124       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1125    }
1126
1127    switch (gsurf->base.TextureTarget) {
1128    case EGL_TEXTURE_2D:
1129       target = ST_TEXTURE_2D;
1130       break;
1131    default:
1132       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1133    }
1134
1135    if (!es1)
1136       return EGL_TRUE;
1137    if (!gsurf->render_surface)
1138       return EGL_FALSE;
1139
1140    /* flush properly if the surface is bound */
1141    if (gsurf->base.CurrentContext) {
1142       gctx = egl_g3d_context(gsurf->base.CurrentContext);
1143       gctx->stapi->st_flush(gctx->st_ctx,
1144             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1145    }
1146
1147    gctx = egl_g3d_context(es1);
1148    gctx->stapi->st_bind_texture_surface(gsurf->render_surface,
1149          target, gsurf->base.MipmapLevel, target_format);
1150
1151    gsurf->base.BoundToTexture = EGL_TRUE;
1152
1153    return EGL_TRUE;
1154 }
1155
1156 static EGLBoolean
1157 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1158                           _EGLSurface *surf, EGLint buffer)
1159 {
1160    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1161
1162    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
1163        !gsurf->base.BoundToTexture)
1164       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
1165    if (buffer != EGL_BACK_BUFFER)
1166       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
1167
1168    if (gsurf->render_surface) {
1169       _EGLContext *ctx = _eglGetAPIContext(EGL_OPENGL_ES_API);
1170       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1171
1172       /* what if the context the surface binds to is no longer current? */
1173       if (gctx)
1174          gctx->stapi->st_unbind_texture_surface(gsurf->render_surface,
1175                ST_TEXTURE_2D, gsurf->base.MipmapLevel);
1176    }
1177
1178    gsurf->base.BoundToTexture = EGL_FALSE;
1179
1180    return EGL_TRUE;
1181 }
1182
1183 #ifdef EGL_MESA_screen_surface
1184
1185 static _EGLSurface *
1186 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1187                               _EGLConfig *conf, const EGLint *attribs)
1188 {
1189    struct egl_g3d_create_surface_arg arg;
1190
1191    memset(&arg, 0, sizeof(arg));
1192    arg.type = EGL_SCREEN_BIT_MESA;
1193
1194    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
1195 }
1196
1197 static EGLBoolean
1198 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1199                             _EGLScreen *scr, _EGLSurface *surf,
1200                             _EGLMode *mode)
1201 {
1202    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1203    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
1204    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1205    struct native_surface *nsurf;
1206    const struct native_mode *nmode;
1207    EGLBoolean changed;
1208
1209    if (gsurf) {
1210       EGLint idx;
1211
1212       if (!mode)
1213          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1214       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
1215          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
1216       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
1217          return _eglError(EGL_BAD_MATCH,
1218                "eglShowSurfaceMESA(surface smaller than mode size)");
1219
1220       /* find the index of the mode */
1221       for (idx = 0; idx < gscr->base.NumModes; idx++)
1222          if (mode == &gscr->base.Modes[idx])
1223             break;
1224       if (idx >= gscr->base.NumModes) {
1225          return _eglError(EGL_BAD_MODE_MESA,
1226                "eglShowSurfaceMESA(unknown mode)");
1227       }
1228
1229       nsurf = gsurf->native;
1230       nmode = gscr->native_modes[idx];
1231    }
1232    else {
1233       if (mode)
1234          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1235
1236       /* disable the screen */
1237       nsurf = NULL;
1238       nmode = NULL;
1239    }
1240
1241    /* TODO surface panning by CRTC choosing */
1242    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
1243          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
1244    if (changed) {
1245       gscr->base.CurrentSurface = &gsurf->base;
1246       gscr->base.CurrentMode = mode;
1247    }
1248
1249    return changed;
1250 }
1251
1252 #endif /* EGL_MESA_screen_surface */
1253
1254 static EGLint
1255 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
1256 {
1257    struct native_probe *nprobe;
1258    enum native_probe_result res;
1259    EGLint score;
1260
1261    nprobe = egl_g3d_get_probe(drv, dpy);
1262    res = native_get_probe_result(nprobe);
1263
1264    switch (res) {
1265    case NATIVE_PROBE_UNKNOWN:
1266    default:
1267       score = 0;
1268       break;
1269    case NATIVE_PROBE_FALLBACK:
1270       score = 40;
1271       break;
1272    case NATIVE_PROBE_SUPPORTED:
1273       score = 50;
1274       break;
1275    case NATIVE_PROBE_EXACT:
1276       score = 100;
1277       break;
1278    }
1279
1280    return score;
1281 }
1282
1283 static void
1284 egl_g3d_unload(_EGLDriver *drv)
1285 {
1286    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1287
1288    egl_g3d_destroy_probe(drv, NULL);
1289    free(gdrv);
1290 }
1291
1292 _EGLDriver *
1293 _eglMain(const char *args)
1294 {
1295    static char driver_name[64];
1296    struct egl_g3d_driver *gdrv;
1297
1298    snprintf(driver_name, sizeof(driver_name),
1299          "Gallium/%s", native_get_name());
1300
1301    gdrv = CALLOC_STRUCT(egl_g3d_driver);
1302    if (!gdrv)
1303       return NULL;
1304
1305    _eglInitDriverFallbacks(&gdrv->base);
1306
1307    gdrv->base.API.Initialize = egl_g3d_initialize;
1308    gdrv->base.API.Terminate = egl_g3d_terminate;
1309    gdrv->base.API.CreateContext = egl_g3d_create_context;
1310    gdrv->base.API.DestroyContext = egl_g3d_destroy_context;
1311    gdrv->base.API.CreateWindowSurface = egl_g3d_create_window_surface;
1312    gdrv->base.API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
1313    gdrv->base.API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
1314    gdrv->base.API.DestroySurface = egl_g3d_destroy_surface;
1315    gdrv->base.API.MakeCurrent = egl_g3d_make_current;
1316    gdrv->base.API.SwapBuffers = egl_g3d_swap_buffers;
1317    gdrv->base.API.CopyBuffers = egl_g3d_copy_buffers;
1318    gdrv->base.API.WaitClient = egl_g3d_wait_client;
1319    gdrv->base.API.WaitNative = egl_g3d_wait_native;
1320    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
1321
1322    gdrv->base.API.BindTexImage = egl_g3d_bind_tex_image;
1323    gdrv->base.API.ReleaseTexImage = egl_g3d_release_tex_image;
1324
1325 #ifdef EGL_MESA_screen_surface
1326    gdrv->base.API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
1327    gdrv->base.API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
1328 #endif
1329
1330    gdrv->base.Name = driver_name;
1331    gdrv->base.Probe = egl_g3d_probe;
1332    gdrv->base.Unload = egl_g3d_unload;
1333
1334    /* the key is " EGL G3D" */
1335    gdrv->probe_key = 0x0E61063D;
1336
1337    return &gdrv->base;
1338 }