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  * Re-validate the context.
 512  */
 513 static void
 514 egl_g3d_update_buffer(struct pipe_screen *screen, void *context_private)
 515 {
 516    struct egl_g3d_context *gctx = egl_g3d_context(context_private);
 517    egl_g3d_validate_context(gctx->base.Resource.Display, &gctx->base);
 518 }
 519
 520 static EGLBoolean
 521 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 522 {
 523    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 524    EGLint i;
 525
 526    _eglReleaseDisplayResources(drv, dpy);
 527    _eglCleanupDisplay(dpy);
 528
 529    if (dpy->Screens) {
 530       for (i = 0; i < dpy->NumScreens; i++) {
 531          struct egl_g3d_screen *gscr = egl_g3d_screen(dpy->Screens[i]);
 532          free(gscr->native_modes);
 533          free(gscr);
 534       }
 535       free(dpy->Screens);
 536    }
 537
 538    if (gdpy->native)
 539       gdpy->native->destroy(gdpy->native);
 540
 541    free(gdpy);
 542    dpy->DriverData = NULL;
 543
 544    return EGL_TRUE;
 545 }
 546
 547 static EGLBoolean
 548 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 549                    EGLint *major, EGLint *minor)
 550 {
 551    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 552    struct egl_g3d_display *gdpy;
 553
 554    /* the probe object is unlikely to be needed again */
 555    egl_g3d_destroy_probe(drv, dpy);
 556
 557    gdpy = CALLOC_STRUCT(egl_g3d_display);
 558    if (!gdpy) {
 559       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 560       goto fail;
 561    }
 562    dpy->DriverData = gdpy;
 563
 564    gdpy->native = native_create_display(dpy->NativeDisplay);
 565    if (!gdpy->native) {
 566       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 567       goto fail;
 568    }
 569
 570    gdpy->native->screen->update_buffer = egl_g3d_update_buffer;
 571
 572    egl_g3d_init_st(&gdrv->base);
 573    dpy->ClientAPIsMask = gdrv->api_mask;
 574
 575 #ifdef EGL_MESA_screen_surface
 576    /* enable MESA_screen_surface before adding (and validating) configs */
 577    if (gdpy->native->modeset) {
 578       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 579       egl_g3d_add_screens(drv, dpy);
 580    }
 581 #endif
 582
 583    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 584       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 585       goto fail;
 586    }
 587
 588    *major = 1;
 589    *minor = 4;
 590
 591    return EGL_TRUE;
 592
 593 fail:
 594    if (gdpy)
 595       egl_g3d_terminate(drv, dpy);
 596    return EGL_FALSE;
 597 }
 598
 599 static _EGLContext *
 600 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 601                        _EGLContext *share, const EGLint *attribs)
 602 {
 603    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 604    struct egl_g3d_context *gshare = egl_g3d_context(share);
 605    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 606    struct egl_g3d_context *gctx;
 607    const __GLcontextModes *mode;
 608
 609    gctx = CALLOC_STRUCT(egl_g3d_context);
 610    if (!gctx) {
 611       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 612       return NULL;
 613    }
 614
 615    if (!_eglInitContext(&gctx->base, dpy, conf, attribs)) {
 616       free(gctx);
 617       return NULL;
 618    }
 619
 620    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 621    if (!gctx->stapi) {
 622       free(gctx);
 623       return NULL;
 624    }
 625
 626    mode = &gconf->native->mode;
 627
 628    gctx->pipe = gdpy->native->screen->context_create(
 629       gdpy->native->screen,
 630       (void *) &gctx->base);
 631
 632    if (!gctx->pipe) {
 633       free(gctx);
 634       return NULL;
 635    }
 636
 637    gctx->st_ctx = gctx->stapi->st_create_context(gctx->pipe, mode,
 638                         (gshare) ? gshare->st_ctx : NULL);
 639    if (!gctx->st_ctx) {
 640       gctx->pipe->destroy(gctx->pipe);
 641       free(gctx);
 642       return NULL;
 643    }
 644
 645    return &gctx->base;
 646 }
 647
 648 /**
 649  * Destroy a context.
 650  */
 651 static void
 652 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 653 {
 654    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 655
 656    /* FIXME a context might live longer than its display */
 657    if (!dpy->Initialized)
 658       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 659
 660    egl_g3d_realloc_context(dpy, &gctx->base);
 661    /* it will destroy the associated pipe context */
 662    gctx->stapi->st_destroy_context(gctx->st_ctx);
 663
 664    free(gctx);
 665 }
 666
 667 static EGLBoolean
 668 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 669 {
 670    if (!_eglIsContextBound(ctx))
 671       destroy_context(dpy, ctx);
 672    return EGL_TRUE;
 673 }
 674
 675 struct egl_g3d_create_surface_arg {
 676    EGLint type;
 677    union {
 678       EGLNativeWindowType win;
 679       EGLNativePixmapType pix;
 680    } u;
 681 };
 682
 683 static _EGLSurface *
 684 egl_g3d_create_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 685                        struct egl_g3d_create_surface_arg *arg,
 686                        const EGLint *attribs)
 687 {
 688    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 689    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 690    struct egl_g3d_surface *gsurf;
 691    struct native_surface *nsurf;
 692    const char *err;
 693
 694    switch (arg->type) {
 695    case EGL_WINDOW_BIT:
 696       err = "eglCreateWindowSurface";
 697       break;
 698    case EGL_PIXMAP_BIT:
 699       err = "eglCreatePixmapSurface";
 700       break;
 701    case EGL_PBUFFER_BIT:
 702       err = "eglCreatePBufferSurface";
 703       break;
 704 #ifdef EGL_MESA_screen_surface
 705    case EGL_SCREEN_BIT_MESA:
 706       err = "eglCreateScreenSurface";
 707       break;
 708 #endif
 709    default:
 710       err = "eglCreateUnknownSurface";
 711       break;
 712    }
 713
 714    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 715    if (!gsurf) {
 716       _eglError(EGL_BAD_ALLOC, err);
 717       return NULL;
 718    }
 719
 720    if (!_eglInitSurface(&gsurf->base, dpy, arg->type, conf, attribs)) {
 721       free(gsurf);
 722       return NULL;
 723    }
 724
 725    /* create the native surface */
 726    switch (arg->type) {
 727    case EGL_WINDOW_BIT:
 728       nsurf = gdpy->native->create_window_surface(gdpy->native,
 729             arg->u.win, gconf->native);
 730       break;
 731    case EGL_PIXMAP_BIT:
 732       nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 733             arg->u.pix, gconf->native);
 734       break;
 735    case EGL_PBUFFER_BIT:
 736       nsurf = gdpy->native->create_pbuffer_surface(gdpy->native,
 737             gconf->native, gsurf->base.Width, gsurf->base.Height);
 738       break;
 739 #ifdef EGL_MESA_screen_surface
 740    case EGL_SCREEN_BIT_MESA:
 741       /* prefer back buffer (move to _eglInitSurface?) */
 742       gsurf->base.RenderBuffer = EGL_BACK_BUFFER;
 743       nsurf = gdpy->native->modeset->create_scanout_surface(gdpy->native,
 744             gconf->native, gsurf->base.Width, gsurf->base.Height);
 745       break;
 746 #endif
 747    default:
 748       nsurf = NULL;
 749       break;
 750    }
 751
 752    if (!nsurf) {
 753       free(gsurf);
 754       return NULL;
 755    }
 756    /* initialize the geometry */
 757    if (!nsurf->validate(nsurf, 0x0, &gsurf->sequence_number, NULL,
 758             &gsurf->base.Width, &gsurf->base.Height)) {
 759       nsurf->destroy(nsurf);
 760       free(gsurf);
 761       return NULL;
 762    }
 763
 764    gsurf->native = nsurf;
 765
 766    gsurf->render_att = (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER) ?
 767       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 768    if (!gconf->native->mode.doubleBufferMode)
 769       gsurf->render_att = NATIVE_ATTACHMENT_FRONT_LEFT;
 770
 771    return &gsurf->base;
 772 }
 773
 774 static _EGLSurface *
 775 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 776                               _EGLConfig *conf, EGLNativeWindowType win,
 777                               const EGLint *attribs)
 778 {
 779    struct egl_g3d_create_surface_arg arg;
 780
 781    memset(&arg, 0, sizeof(arg));
 782    arg.type = EGL_WINDOW_BIT;
 783    arg.u.win = win;
 784
 785    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 786 }
 787
 788 static _EGLSurface *
 789 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 790                               _EGLConfig *conf, EGLNativePixmapType pix,
 791                               const EGLint *attribs)
 792 {
 793    struct egl_g3d_create_surface_arg arg;
 794
 795    memset(&arg, 0, sizeof(arg));
 796    arg.type = EGL_PIXMAP_BIT;
 797    arg.u.pix = pix;
 798
 799    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 800 }
 801
 802 static _EGLSurface *
 803 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 804                                _EGLConfig *conf, const EGLint *attribs)
 805 {
 806    struct egl_g3d_create_surface_arg arg;
 807
 808    memset(&arg, 0, sizeof(arg));
 809    arg.type = EGL_PBUFFER_BIT;
 810
 811    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 812 }
 813
 814 /**
 815  * Destroy a surface.
 816  */
 817 static void
 818 destroy_surface(_EGLDisplay *dpy, _EGLSurface *surf)
 819 {
 820    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 821
 822    /* FIXME a surface might live longer than its display */
 823    if (!dpy->Initialized)
 824       _eglLog(_EGL_FATAL, "destroy a surface with an unitialized display");
 825
 826    pipe_surface_reference(&gsurf->render_surface, NULL);
 827    gsurf->native->destroy(gsurf->native);
 828    free(gsurf);
 829 }
 830
 831 static EGLBoolean
 832 egl_g3d_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 833 {
 834    if (!_eglIsSurfaceBound(surf))
 835       destroy_surface(dpy, surf);
 836    return EGL_TRUE;
 837 }
 838
 839 static EGLBoolean
 840 egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
 841                      _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx)
 842 {
 843    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 844    struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 845    struct egl_g3d_context *old_gctx;
 846    EGLBoolean ok = EGL_TRUE;
 847
 848    /* bind the new context and return the "orphaned" one */
 849    if (!_eglBindContext(&ctx, &draw, &read))
 850       return EGL_FALSE;
 851    old_gctx = egl_g3d_context(ctx);
 852
 853    if (old_gctx) {
 854       /* flush old context */
 855       old_gctx->stapi->st_flush(old_gctx->st_ctx,
 856             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 857
 858       /*
 859        * The old context is no longer current, and egl_g3d_realloc_context()
 860        * should be called to destroy the framebuffers.  However, it is possible
 861        * that it will be made current again with the same draw/read surfaces.
 862        * It might be better to keep it around.
 863        */
 864    }
 865
 866    if (gctx) {
 867       ok = egl_g3d_realloc_context(dpy, &gctx->base);
 868       if (ok) {
 869          ok = gctx->stapi->st_make_current(gctx->st_ctx,
 870                gctx->draw.st_fb, gctx->read.st_fb);
 871          if (ok) {
 872             egl_g3d_validate_context(dpy, &gctx->base);
 873             if (gdraw->base.Type == EGL_WINDOW_BIT) {
 874                gctx->base.WindowRenderBuffer =
 875                   (gdraw->render_att == NATIVE_ATTACHMENT_FRONT_LEFT) ?
 876                   EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 877             }
 878          }
 879       }
 880    }
 881    else if (old_gctx) {
 882       ok = old_gctx->stapi->st_make_current(NULL, NULL, NULL);
 883       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 884    }
 885
 886    if (ctx && !_eglIsContextLinked(ctx))
 887       destroy_context(dpy, ctx);
 888    if (draw && !_eglIsSurfaceLinked(draw))
 889       destroy_surface(dpy, draw);
 890    if (read && read != draw && !_eglIsSurfaceLinked(read))
 891       destroy_surface(dpy, read);
 892
 893    return ok;
 894 }
 895
 896 static EGLBoolean
 897 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 898 {
 899    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 900    _EGLContext *ctx = _eglGetCurrentContext();
 901    struct egl_g3d_context *gctx = NULL;
 902
 903    /* no-op for pixmap or pbuffer surface */
 904    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 905        gsurf->base.Type == EGL_PBUFFER_BIT)
 906       return EGL_TRUE;
 907
 908    /* or when the surface is single-buffered */
 909    if (gsurf->render_att == NATIVE_ATTACHMENT_FRONT_LEFT)
 910       return EGL_TRUE;
 911
 912    if (ctx && ctx->DrawSurface == surf)
 913       gctx = egl_g3d_context(ctx);
 914
 915    /* flush if the surface is current */
 916    if (gctx)
 917       gctx->stapi->st_notify_swapbuffers(gctx->draw.st_fb);
 918
 919    return gsurf->native->swap_buffers(gsurf->native);
 920 }
 921
 922 /**
 923  * Find a config that supports the pixmap.
 924  */
 925 static _EGLConfig *
 926 find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 927 {
 928    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 929    struct egl_g3d_config *gconf;
 930    EGLint i;
 931
 932    for (i = 0; i < dpy->NumConfigs; i++) {
 933       gconf = egl_g3d_config(dpy->Configs[i]);
 934       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 935          break;
 936    }
 937
 938    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 939 }
 940
 941 /**
 942  * Get the pipe surface of the given attachment of the native surface.
 943  */
 944 static struct pipe_surface *
 945 get_pipe_surface(struct native_display *ndpy, struct native_surface *nsurf,
 946                  enum native_attachment natt)
 947 {
 948    struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
 949    struct pipe_surface *psurf;
 950
 951    textures[natt] = NULL;
 952    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 953    if (!textures[natt])
 954       return NULL;
 955
 956    psurf = ndpy->screen->get_tex_surface(ndpy->screen, textures[natt],
 957          0, 0, 0, PIPE_BUFFER_USAGE_CPU_WRITE);
 958    pipe_texture_reference(&textures[natt], NULL);
 959
 960    return psurf;
 961 }
 962
 963 static EGLBoolean
 964 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 965                      EGLNativePixmapType target)
 966 {
 967    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 968    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 969    _EGLContext *ctx = _eglGetCurrentContext();
 970    struct egl_g3d_config *gconf;
 971    struct native_surface *nsurf;
 972    struct pipe_screen *screen = gdpy->native->screen;
 973    struct pipe_surface *psurf;
 974
 975    if (!gsurf->render_surface)
 976       return EGL_TRUE;
 977
 978    gconf = egl_g3d_config(find_pixmap_config(dpy, target));
 979    if (!gconf)
 980       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
 981
 982    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 983          target, gconf->native);
 984    if (!nsurf)
 985       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
 986
 987    /* flush if the surface is current */
 988    if (ctx && ctx->DrawSurface == &gsurf->base) {
 989       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 990       gctx->stapi->st_flush(gctx->st_ctx,
 991             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 992    }
 993
 994    psurf = get_pipe_surface(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
 995    if (psurf) {
 996       struct pipe_context pipe;
 997
 998       /**
 999        * XXX This is hacky.  If we might allow the EGLDisplay to create a pipe
1000        * context of its own and use the blitter context for this.
1001        */
1002       memset(&pipe, 0, sizeof(pipe));
1003       pipe.screen = screen;
1004
1005       util_surface_copy(&pipe, FALSE, psurf, 0, 0,
1006             gsurf->render_surface, 0, 0, psurf->width, psurf->height);
1007
1008       pipe_surface_reference(&psurf, NULL);
1009       nsurf->flush_frontbuffer(nsurf);
1010    }
1011
1012    nsurf->destroy(nsurf);
1013
1014    return EGL_TRUE;
1015 }
1016
1017 static EGLBoolean
1018 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
1019 {
1020    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1021    gctx->stapi->st_finish(gctx->st_ctx);
1022    return EGL_TRUE;
1023 }
1024
1025 static EGLBoolean
1026 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
1027 {
1028    _EGLContext *ctx = _eglGetCurrentContext();
1029
1030    if (engine != EGL_CORE_NATIVE_ENGINE)
1031       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
1032
1033    if (ctx && ctx->DrawSurface) {
1034       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
1035       gsurf->native->wait(gsurf->native);
1036    }
1037
1038    return EGL_TRUE;
1039 }
1040
1041 static _EGLProc
1042 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
1043 {
1044    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1045    _EGLProc proc;
1046    EGLint i;
1047
1048    /* in case this is called before a display is initialized */
1049    egl_g3d_init_st(&gdrv->base);
1050
1051    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
1052       const struct egl_g3d_st *stapi = gdrv->stapis[i];
1053       if (stapi) {
1054          proc = (_EGLProc) stapi->st_get_proc_address(procname);
1055          if (proc)
1056             return proc;
1057       }
1058    }
1059
1060    return (_EGLProc) NULL;
1061 }
1062
1063 static EGLBoolean
1064 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1065                        _EGLSurface *surf, EGLint buffer)
1066 {
1067    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1068    _EGLContext *es1 = _eglGetAPIContext(EGL_OPENGL_ES_API);
1069    struct egl_g3d_context *gctx;
1070    enum pipe_format target_format;
1071    int target;
1072
1073    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
1074       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
1075    if (buffer != EGL_BACK_BUFFER)
1076       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
1077    if (gsurf->base.BoundToTexture)
1078       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
1079
1080    switch (gsurf->base.TextureFormat) {
1081    case EGL_TEXTURE_RGB:
1082       target_format = PIPE_FORMAT_R8G8B8_UNORM;
1083       break;
1084    case EGL_TEXTURE_RGBA:
1085       target_format = PIPE_FORMAT_B8G8R8A8_UNORM;
1086       break;
1087    default:
1088       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1089    }
1090
1091    switch (gsurf->base.TextureTarget) {
1092    case EGL_TEXTURE_2D:
1093       target = ST_TEXTURE_2D;
1094       break;
1095    default:
1096       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1097    }
1098
1099    if (!es1)
1100       return EGL_TRUE;
1101    if (!gsurf->render_surface)
1102       return EGL_FALSE;
1103
1104    /* flush properly if the surface is bound */
1105    if (gsurf->base.CurrentContext) {
1106       gctx = egl_g3d_context(gsurf->base.CurrentContext);
1107       gctx->stapi->st_flush(gctx->st_ctx,
1108             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1109    }
1110
1111    gctx = egl_g3d_context(es1);
1112    gctx->stapi->st_bind_texture_surface(gsurf->render_surface,
1113          target, gsurf->base.MipmapLevel, target_format);
1114
1115    gsurf->base.BoundToTexture = EGL_TRUE;
1116
1117    return EGL_TRUE;
1118 }
1119
1120 static EGLBoolean
1121 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1122                           _EGLSurface *surf, EGLint buffer)
1123 {
1124    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1125
1126    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
1127        !gsurf->base.BoundToTexture)
1128       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
1129    if (buffer != EGL_BACK_BUFFER)
1130       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
1131
1132    if (gsurf->render_surface) {
1133       _EGLContext *ctx = _eglGetAPIContext(EGL_OPENGL_ES_API);
1134       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1135
1136       /* what if the context the surface binds to is no longer current? */
1137       if (gctx)
1138          gctx->stapi->st_unbind_texture_surface(gsurf->render_surface,
1139                ST_TEXTURE_2D, gsurf->base.MipmapLevel);
1140    }
1141
1142    gsurf->base.BoundToTexture = EGL_FALSE;
1143
1144    return EGL_TRUE;
1145 }
1146
1147 #ifdef EGL_MESA_screen_surface
1148
1149 static _EGLSurface *
1150 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1151                               _EGLConfig *conf, const EGLint *attribs)
1152 {
1153    struct egl_g3d_create_surface_arg arg;
1154
1155    memset(&arg, 0, sizeof(arg));
1156    arg.type = EGL_SCREEN_BIT_MESA;
1157
1158    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
1159 }
1160
1161 static EGLBoolean
1162 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1163                             _EGLScreen *scr, _EGLSurface *surf,
1164                             _EGLMode *mode)
1165 {
1166    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1167    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
1168    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1169    struct native_surface *nsurf;
1170    const struct native_mode *nmode;
1171    EGLBoolean changed;
1172
1173    if (gsurf) {
1174       EGLint idx;
1175
1176       if (!mode)
1177          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1178       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
1179          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
1180       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
1181          return _eglError(EGL_BAD_MATCH,
1182                "eglShowSurfaceMESA(surface smaller than mode size)");
1183
1184       /* find the index of the mode */
1185       for (idx = 0; idx < gscr->base.NumModes; idx++)
1186          if (mode == &gscr->base.Modes[idx])
1187             break;
1188       if (idx >= gscr->base.NumModes) {
1189          return _eglError(EGL_BAD_MODE_MESA,
1190                "eglShowSurfaceMESA(unknown mode)");
1191       }
1192
1193       nsurf = gsurf->native;
1194       nmode = gscr->native_modes[idx];
1195    }
1196    else {
1197       if (mode)
1198          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1199
1200       /* disable the screen */
1201       nsurf = NULL;
1202       nmode = NULL;
1203    }
1204
1205    /* TODO surface panning by CRTC choosing */
1206    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
1207          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
1208    if (changed) {
1209       gscr->base.CurrentSurface = &gsurf->base;
1210       gscr->base.CurrentMode = mode;
1211    }
1212
1213    return changed;
1214 }
1215
1216 #endif /* EGL_MESA_screen_surface */
1217
1218 static EGLint
1219 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
1220 {
1221    struct native_probe *nprobe;
1222    enum native_probe_result res;
1223    EGLint score;
1224
1225    nprobe = egl_g3d_get_probe(drv, dpy);
1226    res = native_get_probe_result(nprobe);
1227
1228    switch (res) {
1229    case NATIVE_PROBE_UNKNOWN:
1230    default:
1231       score = 0;
1232       break;
1233    case NATIVE_PROBE_FALLBACK:
1234       score = 40;
1235       break;
1236    case NATIVE_PROBE_SUPPORTED:
1237       score = 50;
1238       break;
1239    case NATIVE_PROBE_EXACT:
1240       score = 100;
1241       break;
1242    }
1243
1244    return score;
1245 }
1246
1247 static void
1248 egl_g3d_unload(_EGLDriver *drv)
1249 {
1250    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1251
1252    egl_g3d_destroy_probe(drv, NULL);
1253    free(gdrv);
1254 }
1255
1256 _EGLDriver *
1257 _eglMain(const char *args)
1258 {
1259    static char driver_name[64];
1260    struct egl_g3d_driver *gdrv;
1261
1262    snprintf(driver_name, sizeof(driver_name),
1263          "Gallium/%s", native_get_name());
1264
1265    gdrv = CALLOC_STRUCT(egl_g3d_driver);
1266    if (!gdrv)
1267       return NULL;
1268
1269    _eglInitDriverFallbacks(&gdrv->base);
1270
1271    gdrv->base.API.Initialize = egl_g3d_initialize;
1272    gdrv->base.API.Terminate = egl_g3d_terminate;
1273    gdrv->base.API.CreateContext = egl_g3d_create_context;
1274    gdrv->base.API.DestroyContext = egl_g3d_destroy_context;
1275    gdrv->base.API.CreateWindowSurface = egl_g3d_create_window_surface;
1276    gdrv->base.API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
1277    gdrv->base.API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
1278    gdrv->base.API.DestroySurface = egl_g3d_destroy_surface;
1279    gdrv->base.API.MakeCurrent = egl_g3d_make_current;
1280    gdrv->base.API.SwapBuffers = egl_g3d_swap_buffers;
1281    gdrv->base.API.CopyBuffers = egl_g3d_copy_buffers;
1282    gdrv->base.API.WaitClient = egl_g3d_wait_client;
1283    gdrv->base.API.WaitNative = egl_g3d_wait_native;
1284    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
1285
1286    gdrv->base.API.BindTexImage = egl_g3d_bind_tex_image;
1287    gdrv->base.API.ReleaseTexImage = egl_g3d_release_tex_image;
1288
1289 #ifdef EGL_MESA_screen_surface
1290    gdrv->base.API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
1291    gdrv->base.API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
1292 #endif
1293
1294    gdrv->base.Name = driver_name;
1295    gdrv->base.Probe = egl_g3d_probe;
1296    gdrv->base.Unload = egl_g3d_unload;
1297
1298    /* the key is " EGL G3D" */
1299    gdrv->probe_key = 0x0E61063D;
1300
1301    return &gdrv->base;
1302 }