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
 532    /**
 533     * It is likely that the surface has changed when this function is called.
 534     * Set force_validate to skip an unnecessary check.
 535     */
 536    gctx->force_validate = EGL_TRUE;
 537    egl_g3d_validate_context(gctx->base.Resource.Display, &gctx->base);
 538 }
 539
 540 static EGLBoolean
 541 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 542 {
 543    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 544    EGLint i;
 545
 546    _eglReleaseDisplayResources(drv, dpy);
 547    _eglCleanupDisplay(dpy);
 548
 549    if (dpy->Screens) {
 550       for (i = 0; i < dpy->NumScreens; i++) {
 551          struct egl_g3d_screen *gscr = egl_g3d_screen(dpy->Screens[i]);
 552          free(gscr->native_modes);
 553          free(gscr);
 554       }
 555       free(dpy->Screens);
 556    }
 557
 558    if (gdpy->native)
 559       gdpy->native->destroy(gdpy->native);
 560
 561    free(gdpy);
 562    dpy->DriverData = NULL;
 563
 564    return EGL_TRUE;
 565 }
 566
 567 static EGLBoolean
 568 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 569                    EGLint *major, EGLint *minor)
 570 {
 571    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 572    struct egl_g3d_display *gdpy;
 573
 574    /* the probe object is unlikely to be needed again */
 575    egl_g3d_destroy_probe(drv, dpy);
 576
 577    gdpy = CALLOC_STRUCT(egl_g3d_display);
 578    if (!gdpy) {
 579       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 580       goto fail;
 581    }
 582    dpy->DriverData = gdpy;
 583
 584    gdpy->native = native_create_display(dpy->NativeDisplay);
 585    if (!gdpy->native) {
 586       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 587       goto fail;
 588    }
 589
 590    gdpy->native->screen->flush_frontbuffer = egl_g3d_flush_frontbuffer;
 591    gdpy->native->screen->update_buffer = egl_g3d_update_buffer;
 592
 593    egl_g3d_init_st(&gdrv->base);
 594    dpy->ClientAPIsMask = gdrv->api_mask;
 595
 596    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 597       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 598       goto fail;
 599    }
 600
 601 #ifdef EGL_MESA_screen_surface
 602    /* enable MESA_screen_surface */
 603    if (gdpy->native->modeset) {
 604       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 605       egl_g3d_add_screens(drv, dpy);
 606    }
 607 #endif
 608
 609    *major = 1;
 610    *minor = 4;
 611
 612    return EGL_TRUE;
 613
 614 fail:
 615    if (gdpy)
 616       egl_g3d_terminate(drv, dpy);
 617    return EGL_FALSE;
 618 }
 619
 620 static _EGLContext *
 621 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 622                        _EGLContext *share, const EGLint *attribs)
 623 {
 624    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 625    struct egl_g3d_context *gshare = egl_g3d_context(share);
 626    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 627    struct egl_g3d_context *gctx;
 628    const __GLcontextModes *mode;
 629
 630    gctx = CALLOC_STRUCT(egl_g3d_context);
 631    if (!gctx) {
 632       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 633       return NULL;
 634    }
 635
 636    if (!_eglInitContext(&gctx->base, dpy, conf, attribs)) {
 637       free(gctx);
 638       return NULL;
 639    }
 640
 641    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 642    if (!gctx->stapi) {
 643       free(gctx);
 644       return NULL;
 645    }
 646
 647    mode = &gconf->native->mode;
 648    gctx->pipe =
 649       gdpy->native->create_context(gdpy->native, (void *) &gctx->base);
 650    if (!gctx->pipe) {
 651       free(gctx);
 652       return NULL;
 653    }
 654
 655    gctx->st_ctx = gctx->stapi->st_create_context(gctx->pipe, mode,
 656                         (gshare) ? gshare->st_ctx : NULL);
 657    if (!gctx->st_ctx) {
 658       gctx->pipe->destroy(gctx->pipe);
 659       free(gctx);
 660       return NULL;
 661    }
 662
 663    return &gctx->base;
 664 }
 665
 666 /**
 667  * Destroy a context.
 668  */
 669 static void
 670 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 671 {
 672    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 673
 674    /* FIXME a context might live longer than its display */
 675    if (!dpy->Initialized)
 676       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 677
 678    egl_g3d_realloc_context(dpy, &gctx->base);
 679    /* it will destroy the associated pipe context */
 680    gctx->stapi->st_destroy_context(gctx->st_ctx);
 681
 682    free(gctx);
 683 }
 684
 685 static EGLBoolean
 686 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 687 {
 688    if (!_eglIsContextBound(ctx))
 689       destroy_context(dpy, ctx);
 690    return EGL_TRUE;
 691 }
 692
 693 static EGLBoolean
 694 init_surface_geometry(_EGLSurface *surf)
 695 {
 696    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 697
 698    return gsurf->native->validate(gsurf->native, 0x0,
 699          &gsurf->sequence_number, NULL,
 700          &gsurf->base.Width, &gsurf->base.Height);
 701 }
 702
 703 static _EGLSurface *
 704 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 705                               _EGLConfig *conf, EGLNativeWindowType win,
 706                               const EGLint *attribs)
 707 {
 708    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 709    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 710    struct egl_g3d_surface *gsurf;
 711
 712    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 713    if (!gsurf) {
 714       _eglError(EGL_BAD_ALLOC, "eglCreateWindowSurface");
 715       return NULL;
 716    }
 717
 718    if (!_eglInitSurface(&gsurf->base, dpy, EGL_WINDOW_BIT, conf, attribs)) {
 719       free(gsurf);
 720       return NULL;
 721    }
 722
 723    gsurf->native =
 724       gdpy->native->create_window_surface(gdpy->native, win, gconf->native);
 725    if (!gsurf->native) {
 726       free(gsurf);
 727       return NULL;
 728    }
 729
 730    if (!init_surface_geometry(&gsurf->base)) {
 731       gsurf->native->destroy(gsurf->native);
 732       free(gsurf);
 733       return NULL;
 734    }
 735
 736    gsurf->render_att = (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER ||
 737                         !gconf->native->mode.doubleBufferMode) ?
 738       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 739
 740    return &gsurf->base;
 741 }
 742
 743 static _EGLSurface *
 744 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 745                               _EGLConfig *conf, EGLNativePixmapType pix,
 746                               const EGLint *attribs)
 747 {
 748    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 749    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 750    struct egl_g3d_surface *gsurf;
 751
 752    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 753    if (!gsurf) {
 754       _eglError(EGL_BAD_ALLOC, "eglCreatePixmapSurface");
 755       return NULL;
 756    }
 757
 758    if (!_eglInitSurface(&gsurf->base, dpy, EGL_PIXMAP_BIT, conf, attribs)) {
 759       free(gsurf);
 760       return NULL;
 761    }
 762
 763    gsurf->native =
 764       gdpy->native->create_pixmap_surface(gdpy->native, pix, gconf->native);
 765    if (!gsurf->native) {
 766       free(gsurf);
 767       return NULL;
 768    }
 769
 770    if (!init_surface_geometry(&gsurf->base)) {
 771       gsurf->native->destroy(gsurf->native);
 772       free(gsurf);
 773       return NULL;
 774    }
 775
 776    gsurf->render_att = NATIVE_ATTACHMENT_FRONT_LEFT;
 777
 778    return &gsurf->base;
 779 }
 780
 781 static _EGLSurface *
 782 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 783                                _EGLConfig *conf, const EGLint *attribs)
 784 {
 785    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 786    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 787    struct egl_g3d_surface *gsurf;
 788
 789    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 790    if (!gsurf) {
 791       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
 792       return NULL;
 793    }
 794
 795    if (!_eglInitSurface(&gsurf->base, dpy, EGL_PBUFFER_BIT, conf, attribs)) {
 796       free(gsurf);
 797       return NULL;
 798    }
 799
 800    gsurf->native =
 801       gdpy->native->create_pbuffer_surface(gdpy->native, gconf->native,
 802             gsurf->base.Width, gsurf->base.Height);
 803    if (!gsurf->native) {
 804       free(gsurf);
 805       return NULL;
 806    }
 807
 808    if (!init_surface_geometry(&gsurf->base)) {
 809       gsurf->native->destroy(gsurf->native);
 810       free(gsurf);
 811       return NULL;
 812    }
 813
 814    gsurf->render_att = (!gconf->native->mode.doubleBufferMode) ?
 815       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 816
 817    return &gsurf->base;
 818 }
 819
 820 /**
 821  * Destroy a surface.
 822  */
 823 static void
 824 destroy_surface(_EGLDisplay *dpy, _EGLSurface *surf)
 825 {
 826    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 827
 828    /* FIXME a surface might live longer than its display */
 829    if (!dpy->Initialized)
 830       _eglLog(_EGL_FATAL, "destroy a surface with an unitialized display");
 831
 832    pipe_surface_reference(&gsurf->render_surface, NULL);
 833    gsurf->native->destroy(gsurf->native);
 834    free(gsurf);
 835 }
 836
 837 static EGLBoolean
 838 egl_g3d_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 839 {
 840    if (!_eglIsSurfaceBound(surf))
 841       destroy_surface(dpy, surf);
 842    return EGL_TRUE;
 843 }
 844
 845 static EGLBoolean
 846 egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
 847                      _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx)
 848 {
 849    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 850    struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 851    struct egl_g3d_context *old_gctx;
 852    EGLBoolean ok = EGL_TRUE;
 853
 854    /* bind the new context and return the "orphaned" one */
 855    if (!_eglBindContext(&ctx, &draw, &read))
 856       return EGL_FALSE;
 857    old_gctx = egl_g3d_context(ctx);
 858
 859    if (old_gctx) {
 860       /* flush old context */
 861       old_gctx->stapi->st_flush(old_gctx->st_ctx,
 862             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 863
 864       /*
 865        * The old context is no longer current, and egl_g3d_realloc_context()
 866        * should be called to destroy the framebuffers.  However, it is possible
 867        * that it will be made current again with the same draw/read surfaces.
 868        * It might be better to keep it around.
 869        */
 870    }
 871
 872    if (gctx) {
 873       ok = egl_g3d_realloc_context(dpy, &gctx->base);
 874       if (ok) {
 875          ok = gctx->stapi->st_make_current(gctx->st_ctx,
 876                gctx->draw.st_fb, gctx->read.st_fb);
 877          if (ok) {
 878             egl_g3d_validate_context(dpy, &gctx->base);
 879             if (gdraw->base.Type == EGL_WINDOW_BIT) {
 880                gctx->base.WindowRenderBuffer =
 881                   (gdraw->render_att == NATIVE_ATTACHMENT_FRONT_LEFT) ?
 882                   EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 883             }
 884          }
 885       }
 886    }
 887    else if (old_gctx) {
 888       ok = old_gctx->stapi->st_make_current(NULL, NULL, NULL);
 889       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 890    }
 891
 892    if (ctx && !_eglIsContextLinked(ctx))
 893       destroy_context(dpy, ctx);
 894    if (draw && !_eglIsSurfaceLinked(draw))
 895       destroy_surface(dpy, draw);
 896    if (read && read != draw && !_eglIsSurfaceLinked(read))
 897       destroy_surface(dpy, read);
 898
 899    return ok;
 900 }
 901
 902 static EGLBoolean
 903 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 904 {
 905    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 906    _EGLContext *ctx = _eglGetCurrentContext();
 907    struct egl_g3d_context *gctx = NULL;
 908
 909    /* no-op for pixmap or pbuffer surface */
 910    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 911        gsurf->base.Type == EGL_PBUFFER_BIT)
 912       return EGL_TRUE;
 913
 914    /* or when the surface is single-buffered */
 915    if (gsurf->render_att == NATIVE_ATTACHMENT_FRONT_LEFT)
 916       return EGL_TRUE;
 917
 918    if (ctx && ctx->DrawSurface == surf)
 919       gctx = egl_g3d_context(ctx);
 920
 921    /* flush if the surface is current */
 922    if (gctx)
 923       gctx->stapi->st_notify_swapbuffers(gctx->draw.st_fb);
 924
 925    /*
 926     * We drew on the back buffer, unless there was no back buffer.
 927     * In that case, we drew on the front buffer.  Either case, we call
 928     * swap_buffers.
 929     */
 930    if (!gsurf->native->swap_buffers(gsurf->native))
 931       return EGL_FALSE;
 932
 933    if (gctx) {
 934       struct egl_g3d_config *gconf = egl_g3d_config(gsurf->base.Config);
 935
 936       /* force validation if the swap method is not copy */
 937       if (gconf->native->mode.swapMethod != GLX_SWAP_COPY_OML) {
 938          gctx->force_validate = EGL_TRUE;
 939          egl_g3d_validate_context(dpy, &gctx->base);
 940       }
 941    }
 942
 943    return EGL_TRUE;
 944 }
 945
 946 /**
 947  * Find a config that supports the pixmap.
 948  */
 949 static _EGLConfig *
 950 find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 951 {
 952    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 953    struct egl_g3d_config *gconf;
 954    EGLint i;
 955
 956    for (i = 0; i < dpy->NumConfigs; i++) {
 957       gconf = egl_g3d_config(dpy->Configs[i]);
 958       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 959          break;
 960    }
 961
 962    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 963 }
 964
 965 /**
 966  * Get the pipe surface of the given attachment of the native surface.
 967  */
 968 static struct pipe_surface *
 969 get_pipe_surface(struct native_display *ndpy, struct native_surface *nsurf,
 970                  enum native_attachment natt)
 971 {
 972    struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
 973    struct pipe_surface *psurf;
 974
 975    textures[natt] = NULL;
 976    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 977    if (!textures[natt])
 978       return NULL;
 979
 980    psurf = ndpy->screen->get_tex_surface(ndpy->screen, textures[natt],
 981          0, 0, 0, PIPE_BUFFER_USAGE_CPU_WRITE);
 982    pipe_texture_reference(&textures[natt], NULL);
 983
 984    return psurf;
 985 }
 986
 987 static EGLBoolean
 988 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 989                      EGLNativePixmapType target)
 990 {
 991    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 992    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 993    _EGLContext *ctx = _eglGetCurrentContext();
 994    struct egl_g3d_config *gconf;
 995    struct native_surface *nsurf;
 996    struct pipe_screen *screen = gdpy->native->screen;
 997    struct pipe_surface *psurf;
 998
 999    if (!gsurf->render_surface)
1000       return EGL_TRUE;
1001
1002    gconf = egl_g3d_config(find_pixmap_config(dpy, target));
1003    if (!gconf)
1004       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1005
1006    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
1007          target, gconf->native);
1008    if (!nsurf)
1009       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1010
1011    /* flush if the surface is current */
1012    if (ctx && ctx->DrawSurface == &gsurf->base) {
1013       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1014       gctx->stapi->st_flush(gctx->st_ctx,
1015             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1016    }
1017
1018    psurf = get_pipe_surface(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
1019    if (psurf) {
1020       struct pipe_context pipe;
1021
1022       /**
1023        * XXX This is hacky.  If we might allow the EGLDisplay to create a pipe
1024        * context of its own and use the blitter context for this.
1025        */
1026       memset(&pipe, 0, sizeof(pipe));
1027       pipe.screen = screen;
1028
1029       util_surface_copy(&pipe, FALSE, psurf, 0, 0,
1030             gsurf->render_surface, 0, 0, psurf->width, psurf->height);
1031
1032       pipe_surface_reference(&psurf, NULL);
1033       nsurf->flush_frontbuffer(nsurf);
1034    }
1035
1036    nsurf->destroy(nsurf);
1037
1038    return EGL_TRUE;
1039 }
1040
1041 static EGLBoolean
1042 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
1043 {
1044    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1045    gctx->stapi->st_finish(gctx->st_ctx);
1046    return EGL_TRUE;
1047 }
1048
1049 static EGLBoolean
1050 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
1051 {
1052    _EGLContext *ctx = _eglGetCurrentContext();
1053
1054    if (engine != EGL_CORE_NATIVE_ENGINE)
1055       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
1056
1057    if (ctx && ctx->DrawSurface) {
1058       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
1059       gsurf->native->wait(gsurf->native);
1060    }
1061
1062    return EGL_TRUE;
1063 }
1064
1065 static _EGLProc
1066 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
1067 {
1068    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1069    _EGLProc proc;
1070    EGLint i;
1071
1072    /* in case this is called before a display is initialized */
1073    egl_g3d_init_st(&gdrv->base);
1074
1075    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
1076       const struct egl_g3d_st *stapi = gdrv->stapis[i];
1077       if (stapi) {
1078          proc = (_EGLProc) stapi->st_get_proc_address(procname);
1079          if (proc)
1080             return proc;
1081       }
1082    }
1083
1084    return (_EGLProc) NULL;
1085 }
1086
1087 static EGLBoolean
1088 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1089                        _EGLSurface *surf, EGLint buffer)
1090 {
1091    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1092    _EGLContext *es1 = _eglGetAPIContext(EGL_OPENGL_ES_API);
1093    struct egl_g3d_context *gctx;
1094    enum pipe_format target_format;
1095    int target;
1096
1097    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
1098       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
1099    if (buffer != EGL_BACK_BUFFER)
1100       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
1101    if (gsurf->base.BoundToTexture)
1102       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
1103
1104    switch (gsurf->base.TextureFormat) {
1105    case EGL_TEXTURE_RGB:
1106       target_format = PIPE_FORMAT_R8G8B8_UNORM;
1107       break;
1108    case EGL_TEXTURE_RGBA:
1109       target_format = PIPE_FORMAT_A8R8G8B8_UNORM;
1110       break;
1111    default:
1112       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1113    }
1114
1115    switch (gsurf->base.TextureTarget) {
1116    case EGL_TEXTURE_2D:
1117       target = ST_TEXTURE_2D;
1118       break;
1119    default:
1120       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1121    }
1122
1123    if (!es1)
1124       return EGL_TRUE;
1125    if (!gsurf->render_surface)
1126       return EGL_FALSE;
1127
1128    /* flush properly if the surface is bound */
1129    if (gsurf->base.CurrentContext) {
1130       gctx = egl_g3d_context(gsurf->base.CurrentContext);
1131       gctx->stapi->st_flush(gctx->st_ctx,
1132             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1133    }
1134
1135    gctx = egl_g3d_context(es1);
1136    gctx->stapi->st_bind_texture_surface(gsurf->render_surface,
1137          target, gsurf->base.MipmapLevel, target_format);
1138
1139    gsurf->base.BoundToTexture = EGL_TRUE;
1140
1141    return EGL_TRUE;
1142 }
1143
1144 static EGLBoolean
1145 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1146                           _EGLSurface *surf, EGLint buffer)
1147 {
1148    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1149
1150    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
1151        !gsurf->base.BoundToTexture)
1152       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
1153    if (buffer != EGL_BACK_BUFFER)
1154       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
1155
1156    if (gsurf->render_surface) {
1157       _EGLContext *ctx = _eglGetAPIContext(EGL_OPENGL_ES_API);
1158       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1159
1160       /* what if the context the surface binds to is no longer current? */
1161       if (gctx)
1162          gctx->stapi->st_unbind_texture_surface(gsurf->render_surface,
1163                ST_TEXTURE_2D, gsurf->base.MipmapLevel);
1164    }
1165
1166    gsurf->base.BoundToTexture = EGL_FALSE;
1167
1168    return EGL_TRUE;
1169 }
1170
1171 #ifdef EGL_MESA_screen_surface
1172
1173 static _EGLSurface *
1174 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1175                               _EGLConfig *conf, const EGLint *attribs)
1176 {
1177    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1178    struct egl_g3d_config *gconf = egl_g3d_config(conf);
1179    struct egl_g3d_surface *gsurf;
1180
1181    gsurf = CALLOC_STRUCT(egl_g3d_surface);
1182    if (!gsurf) {
1183       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
1184       return NULL;
1185    }
1186
1187    if (!_eglInitSurface(&gsurf->base, dpy,
1188             EGL_SCREEN_BIT_MESA, conf, attribs)) {
1189       free(gsurf);
1190       return NULL;
1191    }
1192
1193    gsurf->native =
1194       gdpy->native->modeset->create_scanout_surface(gdpy->native,
1195             gconf->native, gsurf->base.Width, gsurf->base.Height);
1196    if (!gsurf->native) {
1197       free(gsurf);
1198       return NULL;
1199    }
1200
1201    gsurf->render_att = (!gconf->native->mode.doubleBufferMode) ?
1202       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
1203
1204    return &gsurf->base;
1205 }
1206
1207 static EGLBoolean
1208 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1209                             _EGLScreen *scr, _EGLSurface *surf,
1210                             _EGLMode *mode)
1211 {
1212    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1213    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
1214    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1215    struct native_surface *nsurf;
1216    const struct native_mode *nmode;
1217    EGLBoolean changed;
1218
1219    if (gsurf) {
1220       EGLint idx;
1221
1222       if (!mode)
1223          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1224       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
1225          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
1226       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
1227          return _eglError(EGL_BAD_MATCH,
1228                "eglShowSurfaceMESA(surface smaller than mode size)");
1229
1230       /* find the index of the mode */
1231       for (idx = 0; idx < gscr->base.NumModes; idx++)
1232          if (mode == &gscr->base.Modes[idx])
1233             break;
1234       if (idx >= gscr->base.NumModes) {
1235          return _eglError(EGL_BAD_MODE_MESA,
1236                "eglShowSurfaceMESA(unknown mode)");
1237       }
1238
1239       nsurf = gsurf->native;
1240       nmode = gscr->native_modes[idx];
1241    }
1242    else {
1243       if (mode)
1244          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1245
1246       /* disable the screen */
1247       nsurf = NULL;
1248       nmode = NULL;
1249    }
1250
1251    /* TODO surface panning by CRTC choosing */
1252    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
1253          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
1254    if (changed) {
1255       gscr->base.CurrentSurface = &gsurf->base;
1256       gscr->base.CurrentMode = mode;
1257    }
1258
1259    return changed;
1260 }
1261
1262 #endif /* EGL_MESA_screen_surface */
1263
1264 static EGLint
1265 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
1266 {
1267    struct native_probe *nprobe;
1268    enum native_probe_result res;
1269    EGLint score;
1270
1271    nprobe = egl_g3d_get_probe(drv, dpy);
1272    res = native_get_probe_result(nprobe);
1273
1274    switch (res) {
1275    case NATIVE_PROBE_UNKNOWN:
1276    default:
1277       score = 0;
1278       break;
1279    case NATIVE_PROBE_FALLBACK:
1280       score = 40;
1281       break;
1282    case NATIVE_PROBE_SUPPORTED:
1283       score = 50;
1284       break;
1285    case NATIVE_PROBE_EXACT:
1286       score = 100;
1287       break;
1288    }
1289
1290    return score;
1291 }
1292
1293 static void
1294 egl_g3d_unload(_EGLDriver *drv)
1295 {
1296    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1297
1298    egl_g3d_destroy_probe(drv, NULL);
1299    free(gdrv);
1300 }
1301
1302 _EGLDriver *
1303 _eglMain(const char *args)
1304 {
1305    static char driver_name[64];
1306    struct egl_g3d_driver *gdrv;
1307
1308    snprintf(driver_name, sizeof(driver_name),
1309          "Gallium/%s", native_get_name());
1310
1311    gdrv = CALLOC_STRUCT(egl_g3d_driver);
1312    if (!gdrv)
1313       return NULL;
1314
1315    _eglInitDriverFallbacks(&gdrv->base);
1316
1317    gdrv->base.API.Initialize = egl_g3d_initialize;
1318    gdrv->base.API.Terminate = egl_g3d_terminate;
1319    gdrv->base.API.CreateContext = egl_g3d_create_context;
1320    gdrv->base.API.DestroyContext = egl_g3d_destroy_context;
1321    gdrv->base.API.CreateWindowSurface = egl_g3d_create_window_surface;
1322    gdrv->base.API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
1323    gdrv->base.API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
1324    gdrv->base.API.DestroySurface = egl_g3d_destroy_surface;
1325    gdrv->base.API.MakeCurrent = egl_g3d_make_current;
1326    gdrv->base.API.SwapBuffers = egl_g3d_swap_buffers;
1327    gdrv->base.API.CopyBuffers = egl_g3d_copy_buffers;
1328    gdrv->base.API.WaitClient = egl_g3d_wait_client;
1329    gdrv->base.API.WaitNative = egl_g3d_wait_native;
1330    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
1331
1332    gdrv->base.API.BindTexImage = egl_g3d_bind_tex_image;
1333    gdrv->base.API.ReleaseTexImage = egl_g3d_release_tex_image;
1334
1335 #ifdef EGL_MESA_screen_surface
1336    gdrv->base.API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
1337    gdrv->base.API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
1338 #endif
1339
1340    gdrv->base.Name = driver_name;
1341    gdrv->base.Probe = egl_g3d_probe;
1342    gdrv->base.Unload = egl_g3d_unload;
1343
1344    /* the key is " EGL G3D" */
1345    gdrv->probe_key = 0x0E61063D;
1346
1347    return &gdrv->base;
1348 }