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_g3d_image.h"
  40 #include "egl_st.h"
  41
  42 /**
  43  * Validate the draw/read surfaces of the context.
  44  */
  45 static void
  46 egl_g3d_validate_context(_EGLDisplay *dpy, _EGLContext *ctx)
  47 {
  48    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
  49    struct pipe_screen *screen = gdpy->native->screen;
  50    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
  51    const uint st_att_map[NUM_NATIVE_ATTACHMENTS] = {
  52       ST_SURFACE_FRONT_LEFT,
  53       ST_SURFACE_BACK_LEFT,
  54       ST_SURFACE_FRONT_RIGHT,
  55       ST_SURFACE_BACK_RIGHT,
  56    };
  57    EGLint num_surfaces, s;
  58
  59    /* validate draw and/or read buffers */
  60    num_surfaces = (gctx->base.ReadSurface == gctx->base.DrawSurface) ? 1 : 2;
  61    for (s = 0; s < num_surfaces; s++) {
  62       struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
  63       struct egl_g3d_surface *gsurf;
  64       struct egl_g3d_buffer *gbuf;
  65       EGLint att;
  66
  67       if (s == 0) {
  68          gsurf = egl_g3d_surface(gctx->base.DrawSurface);
  69          gbuf = &gctx->draw;
  70       }
  71       else {
  72          gsurf = egl_g3d_surface(gctx->base.ReadSurface);
  73          gbuf = &gctx->read;
  74       }
  75
  76       if (!gctx->force_validate) {
  77          unsigned int seq_num;
  78
  79          gsurf->native->validate(gsurf->native, gbuf->attachment_mask,
  80                &seq_num, NULL, NULL, NULL);
  81          /* skip validation */
  82          if (gsurf->sequence_number == seq_num)
  83             continue;
  84       }
  85
  86       pipe_surface_reference(&gsurf->render_surface, NULL);
  87       memset(textures, 0, sizeof(textures));
  88
  89       gsurf->native->validate(gsurf->native, gbuf->attachment_mask,
  90             &gsurf->sequence_number, textures,
  91             &gsurf->base.Width, &gsurf->base.Height);
  92       for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
  93          struct pipe_texture *pt = textures[att];
  94          struct pipe_surface *ps;
  95
  96          if (native_attachment_mask_test(gbuf->attachment_mask, att) && pt) {
  97             ps = screen->get_tex_surface(screen, pt, 0, 0, 0,
  98                   PIPE_BUFFER_USAGE_GPU_READ |
  99                   PIPE_BUFFER_USAGE_GPU_WRITE);
 100             gctx->stapi->st_set_framebuffer_surface(gbuf->st_fb,
 101                   st_att_map[att], ps);
 102
 103             if (gsurf->render_att == att)
 104                pipe_surface_reference(&gsurf->render_surface, ps);
 105
 106             pipe_surface_reference(&ps, NULL);
 107             pipe_texture_reference(&pt, NULL);
 108          }
 109       }
 110
 111       gctx->stapi->st_resize_framebuffer(gbuf->st_fb,
 112             gsurf->base.Width, gsurf->base.Height);
 113    }
 114
 115    gctx->force_validate = EGL_FALSE;
 116
 117 }
 118
 119 /**
 120  * Create a st_framebuffer.
 121  */
 122 static struct st_framebuffer *
 123 create_framebuffer(_EGLContext *ctx, _EGLSurface *surf)
 124 {
 125    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 126    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 127    struct egl_g3d_config *gconf = egl_g3d_config(gsurf->base.Config);
 128
 129    return gctx->stapi->st_create_framebuffer(&gconf->native->mode,
 130          gconf->native->color_format, gconf->native->depth_format,
 131          gconf->native->stencil_format,
 132          gsurf->base.Width, gsurf->base.Height, &gsurf->base);
 133 }
 134
 135 /**
 136  * Update the attachments of draw/read surfaces.
 137  */
 138 static void
 139 egl_g3d_route_context(_EGLDisplay *dpy, _EGLContext *ctx)
 140 {
 141    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 142    EGLint s;
 143
 144    /* route draw and read buffers' attachments */
 145    for (s = 0; s < 2; s++) {
 146       struct egl_g3d_surface *gsurf;
 147       struct egl_g3d_buffer *gbuf;
 148
 149       if (s == 0) {
 150          gsurf = egl_g3d_surface(gctx->base.DrawSurface);
 151          gbuf = &gctx->draw;
 152       }
 153       else {
 154          gsurf = egl_g3d_surface(gctx->base.ReadSurface);
 155          gbuf = &gctx->read;
 156       }
 157
 158       gbuf->attachment_mask = (1 << gsurf->render_att);
 159
 160       /* FIXME OpenGL defaults to draw the front or back buffer when the
 161        * context is single-buffered or double-buffered respectively.  In EGL,
 162        * however, the buffer to be drawn is determined by the surface, instead
 163        * of the context.  As a result, rendering to a pixmap surface with a
 164        * double-buffered context does not work as expected.
 165        *
 166        * gctx->stapi->st_draw_front_buffer(gctx->st_ctx, natt ==
 167        *    NATIVE_ATTACHMENT_FRONT_LEFT);
 168        */
 169
 170       /*
 171        * FIXME If the back buffer is asked for here, and the front buffer is
 172        * later needed by the client API (e.g. glDrawBuffer is called to draw
 173        * the front buffer), it will create a new pipe texture and draw there.
 174        * One fix is to ask for both buffers here, but it would be a waste if
 175        * the front buffer is never used.  A better fix is to add a callback to
 176        * the pipe screen with context private (just like flush_frontbuffer).
 177        */
 178    }
 179 }
 180
 181 /**
 182  * Reallocate the context's framebuffers after draw/read surfaces change.
 183  */
 184 static EGLBoolean
 185 egl_g3d_realloc_context(_EGLDisplay *dpy, _EGLContext *ctx)
 186 {
 187    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 188    struct egl_g3d_surface *gdraw = egl_g3d_surface(gctx->base.DrawSurface);
 189    struct egl_g3d_surface *gread = egl_g3d_surface(gctx->base.ReadSurface);
 190
 191    /* unreference the old framebuffers */
 192    if (gctx->draw.st_fb) {
 193       EGLBoolean is_equal = (gctx->draw.st_fb == gctx->read.st_fb);
 194       void *priv;
 195
 196       priv = gctx->stapi->st_framebuffer_private(gctx->draw.st_fb);
 197       if (!gdraw || priv != (void *) &gdraw->base) {
 198          gctx->stapi->st_unreference_framebuffer(gctx->draw.st_fb);
 199          gctx->draw.st_fb = NULL;
 200          gctx->draw.attachment_mask = 0x0;
 201       }
 202
 203       if (is_equal) {
 204          gctx->read.st_fb = NULL;
 205          gctx->draw.attachment_mask = 0x0;
 206       }
 207       else {
 208          priv = gctx->stapi->st_framebuffer_private(gctx->read.st_fb);
 209          if (!gread || priv != (void *) &gread->base) {
 210             gctx->stapi->st_unreference_framebuffer(gctx->read.st_fb);
 211             gctx->read.st_fb = NULL;
 212             gctx->draw.attachment_mask = 0x0;
 213          }
 214       }
 215    }
 216
 217    if (!gdraw)
 218       return EGL_TRUE;
 219
 220    /* create the draw fb */
 221    if (!gctx->draw.st_fb) {
 222       gctx->draw.st_fb = create_framebuffer(&gctx->base, &gdraw->base);
 223       if (!gctx->draw.st_fb)
 224          return EGL_FALSE;
 225    }
 226
 227    /* create the read fb */
 228    if (!gctx->read.st_fb) {
 229       if (gread != gdraw) {
 230          gctx->read.st_fb = create_framebuffer(&gctx->base, &gread->base);
 231          if (!gctx->read.st_fb) {
 232             gctx->stapi->st_unreference_framebuffer(gctx->draw.st_fb);
 233             gctx->draw.st_fb = NULL;
 234             return EGL_FALSE;
 235          }
 236       }
 237       else {
 238          /* there is no st_reference_framebuffer... */
 239          gctx->read.st_fb = gctx->draw.st_fb;
 240       }
 241    }
 242
 243    egl_g3d_route_context(dpy, &gctx->base);
 244    gctx->force_validate = EGL_TRUE;
 245
 246    return EGL_TRUE;
 247 }
 248
 249 /**
 250  * Return the state tracker for the given context.
 251  */
 252 static const struct egl_g3d_st *
 253 egl_g3d_choose_st(_EGLDriver *drv, _EGLContext *ctx)
 254 {
 255    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 256    const struct egl_g3d_st *stapi;
 257    EGLint idx = -1;
 258
 259    switch (ctx->ClientAPI) {
 260    case EGL_OPENGL_ES_API:
 261       switch (ctx->ClientVersion) {
 262       case 1:
 263          idx = EGL_G3D_ST_OPENGL_ES;
 264          break;
 265       case 2:
 266          idx = EGL_G3D_ST_OPENGL_ES2;
 267          break;
 268       default:
 269          _eglLog(_EGL_WARNING, "unknown client version %d",
 270                ctx->ClientVersion);
 271          break;
 272       }
 273       break;
 274    case EGL_OPENVG_API:
 275       idx = EGL_G3D_ST_OPENVG;
 276       break;
 277    case EGL_OPENGL_API:
 278       idx = EGL_G3D_ST_OPENGL;
 279       break;
 280    default:
 281       _eglLog(_EGL_WARNING, "unknown client API 0x%04x", ctx->ClientAPI);
 282       break;
 283    }
 284
 285    stapi = (idx >= 0) ? gdrv->stapis[idx] : NULL;
 286    return stapi;
 287 }
 288
 289 /**
 290  * Initialize the state trackers.
 291  */
 292 static void
 293 egl_g3d_init_st(_EGLDriver *drv)
 294 {
 295    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 296    EGLint i;
 297
 298    /* already initialized */
 299    if (gdrv->api_mask)
 300       return;
 301
 302    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
 303       gdrv->stapis[i] = egl_g3d_get_st(i);
 304       if (gdrv->stapis[i])
 305          gdrv->api_mask |= gdrv->stapis[i]->api_bit;
 306    }
 307
 308    if (gdrv->api_mask)
 309       _eglLog(_EGL_DEBUG, "Driver API mask: 0x%x", gdrv->api_mask);
 310    else
 311       _eglLog(_EGL_WARNING, "No supported client API");
 312 }
 313
 314 /**
 315  * Get the probe object of the display.
 316  *
 317  * Note that this function may be called before the display is initialized.
 318  */
 319 static struct native_probe *
 320 egl_g3d_get_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 321 {
 322    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 323    struct native_probe *nprobe;
 324
 325    nprobe = (struct native_probe *) _eglGetProbeCache(gdrv->probe_key);
 326    if (!nprobe || nprobe->display != dpy->NativeDisplay) {
 327       if (nprobe)
 328          nprobe->destroy(nprobe);
 329       nprobe = native_create_probe(dpy->NativeDisplay);
 330       _eglSetProbeCache(gdrv->probe_key, (void *) nprobe);
 331    }
 332
 333    return nprobe;
 334 }
 335
 336 /**
 337  * Destroy the probe object of the display.  The display may be NULL.
 338  *
 339  * Note that this function may be called before the display is initialized.
 340  */
 341 static void
 342 egl_g3d_destroy_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 343 {
 344    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 345    struct native_probe *nprobe;
 346
 347    nprobe = (struct native_probe *) _eglGetProbeCache(gdrv->probe_key);
 348    if (nprobe && (!dpy || nprobe->display == dpy->NativeDisplay)) {
 349       nprobe->destroy(nprobe);
 350       _eglSetProbeCache(gdrv->probe_key, NULL);
 351    }
 352 }
 353
 354 /**
 355  * Return an API mask that consists of the state trackers that supports the
 356  * given mode.
 357  *
 358  * FIXME add st_is_mode_supported()?
 359  */
 360 static EGLint
 361 get_mode_api_mask(const __GLcontextModes *mode, EGLint api_mask)
 362 {
 363    EGLint check;
 364
 365    /* OpenGL ES 1.x and 2.x are checked together */
 366    check = EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT;
 367    if (api_mask & check) {
 368       /* this is required by EGL, not by OpenGL ES */
 369       if (mode->drawableType & GLX_WINDOW_BIT && !mode->doubleBufferMode)
 370          api_mask &= ~check;
 371    }
 372
 373    check = EGL_OPENVG_BIT;
 374    if (api_mask & check) {
 375       /* vega st needs the depth/stencil rb */
 376       if (!mode->depthBits && !mode->stencilBits)
 377          api_mask &= ~check;
 378    }
 379
 380    return api_mask;
 381 }
 382
 383 #ifdef EGL_MESA_screen_surface
 384
 385 static void
 386 egl_g3d_add_screens(_EGLDriver *drv, _EGLDisplay *dpy)
 387 {
 388    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 389    const struct native_connector **native_connectors;
 390    EGLint num_connectors, i;
 391
 392    native_connectors =
 393       gdpy->native->modeset->get_connectors(gdpy->native, &num_connectors, NULL);
 394    if (!num_connectors) {
 395       if (native_connectors)
 396          free(native_connectors);
 397       return;
 398    }
 399
 400    for (i = 0; i < num_connectors; i++) {
 401       const struct native_connector *nconn = native_connectors[i];
 402       struct egl_g3d_screen *gscr;
 403       const struct native_mode **native_modes;
 404       EGLint num_modes, j;
 405
 406       /* TODO support for hotplug */
 407       native_modes =
 408          gdpy->native->modeset->get_modes(gdpy->native, nconn, &num_modes);
 409       if (!num_modes) {
 410          if (native_modes)
 411             free(native_modes);
 412          continue;
 413       }
 414
 415       gscr = CALLOC_STRUCT(egl_g3d_screen);
 416       if (!gscr) {
 417          free(native_modes);
 418          continue;
 419       }
 420
 421       _eglInitScreen(&gscr->base);
 422
 423       for (j = 0; j < num_modes; j++) {
 424          const struct native_mode *nmode = native_modes[j];
 425          _EGLMode *mode;
 426
 427          mode = _eglAddNewMode(&gscr->base, nmode->width, nmode->height,
 428                nmode->refresh_rate, nmode->desc);
 429          if (!mode)
 430             break;
 431          /* gscr->native_modes and gscr->base.Modes should be consistent */
 432          assert(mode == &gscr->base.Modes[j]);
 433       }
 434
 435       gscr->native = nconn;
 436       gscr->native_modes = native_modes;
 437
 438       _eglAddScreen(dpy, &gscr->base);
 439    }
 440
 441    free(native_connectors);
 442 }
 443
 444 #endif /* EGL_MESA_screen_surface */
 445
 446 /**
 447  * Add configs to display and return the next config ID.
 448  */
 449 static EGLint
 450 egl_g3d_add_configs(_EGLDriver *drv, _EGLDisplay *dpy, EGLint id)
 451 {
 452    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 453    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 454    const struct native_config **native_configs;
 455    int num_configs, i;
 456
 457    native_configs = gdpy->native->get_configs(gdpy->native,
 458          &num_configs);
 459    if (!num_configs) {
 460       if (native_configs)
 461          free(native_configs);
 462       return id;
 463    }
 464
 465    for (i = 0; i < num_configs; i++) {
 466       EGLint api_mask;
 467       struct egl_g3d_config *gconf;
 468       EGLBoolean valid;
 469
 470       gconf = CALLOC_STRUCT(egl_g3d_config);
 471       if (!gconf)
 472          continue;
 473
 474       _eglInitConfig(&gconf->base, dpy, id);
 475
 476       api_mask = get_mode_api_mask(&native_configs[i]->mode, gdrv->api_mask);
 477       if (!api_mask) {
 478          _eglLog(_EGL_DEBUG, "no state tracker supports config 0x%x",
 479                native_configs[i]->mode.visualID);
 480       }
 481
 482       valid = _eglConfigFromContextModesRec(&gconf->base,
 483             &native_configs[i]->mode, api_mask, api_mask);
 484       if (valid) {
 485 #ifdef EGL_MESA_screen_surface
 486          /* check if scanout surface bit is set */
 487          if (native_configs[i]->scanout_bit) {
 488             EGLint val = GET_CONFIG_ATTRIB(&gconf->base, EGL_SURFACE_TYPE);
 489             val |= EGL_SCREEN_BIT_MESA;
 490             SET_CONFIG_ATTRIB(&gconf->base, EGL_SURFACE_TYPE, val);
 491          }
 492 #endif
 493          valid = _eglValidateConfig(&gconf->base, EGL_FALSE);
 494       }
 495       if (!valid) {
 496          _eglLog(_EGL_DEBUG, "skip invalid config 0x%x",
 497                native_configs[i]->mode.visualID);
 498          free(gconf);
 499          continue;
 500       }
 501
 502       gconf->native = native_configs[i];
 503       _eglAddConfig(dpy, &gconf->base);
 504       id++;
 505    }
 506
 507    free(native_configs);
 508    return id;
 509 }
 510
 511 /**
 512  * Re-validate the context.
 513  */
 514 static void
 515 egl_g3d_update_buffer(struct pipe_screen *screen, void *context_private)
 516 {
 517    struct egl_g3d_context *gctx = egl_g3d_context(context_private);
 518    egl_g3d_validate_context(gctx->base.Resource.Display, &gctx->base);
 519 }
 520
 521 static void
 522 egl_g3d_invalid_surface(struct native_display *ndpy,
 523                         struct native_surface *nsurf,
 524                         unsigned int seq_num)
 525 {
 526    /* XXX not thread safe? */
 527    struct egl_g3d_surface *gsurf = egl_g3d_surface(nsurf->user_data);
 528    struct egl_g3d_context *gctx = egl_g3d_context(gsurf->base.CurrentContext);
 529
 530    /* set force_validate to skip an unnecessary check */
 531    if (gctx)
 532       gctx->force_validate = TRUE;
 533 }
 534
 535 static struct native_event_handler egl_g3d_native_event_handler = {
 536    .invalid_surface = egl_g3d_invalid_surface
 537 };
 538
 539 static EGLBoolean
 540 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 541 {
 542    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 543    EGLint i;
 544
 545    _eglReleaseDisplayResources(drv, dpy);
 546    _eglCleanupDisplay(dpy);
 547
 548    if (dpy->Screens) {
 549       for (i = 0; i < dpy->NumScreens; i++) {
 550          struct egl_g3d_screen *gscr = egl_g3d_screen(dpy->Screens[i]);
 551          free(gscr->native_modes);
 552          free(gscr);
 553       }
 554       free(dpy->Screens);
 555    }
 556
 557    if (gdpy->native)
 558       gdpy->native->destroy(gdpy->native);
 559
 560    free(gdpy);
 561    dpy->DriverData = NULL;
 562
 563    return EGL_TRUE;
 564 }
 565
 566 static EGLBoolean
 567 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 568                    EGLint *major, EGLint *minor)
 569 {
 570    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 571    struct egl_g3d_display *gdpy;
 572
 573    /* the probe object is unlikely to be needed again */
 574    egl_g3d_destroy_probe(drv, dpy);
 575
 576    gdpy = CALLOC_STRUCT(egl_g3d_display);
 577    if (!gdpy) {
 578       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 579       goto fail;
 580    }
 581    dpy->DriverData = gdpy;
 582
 583    gdpy->native = native_create_display(dpy->NativeDisplay,
 584          &egl_g3d_native_event_handler);
 585    if (!gdpy->native) {
 586       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 587       goto fail;
 588    }
 589
 590    gdpy->native->user_data = (void *) dpy;
 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 #ifdef EGL_MESA_screen_surface
 597    /* enable MESA_screen_surface before adding (and validating) configs */
 598    if (gdpy->native->modeset) {
 599       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 600       egl_g3d_add_screens(drv, dpy);
 601    }
 602 #endif
 603
 604    dpy->Extensions.KHR_image_base = EGL_TRUE;
 605    if (gdpy->native->get_param(gdpy->native, NATIVE_PARAM_USE_NATIVE_BUFFER))
 606       dpy->Extensions.KHR_image_pixmap = EGL_TRUE;
 607
 608    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 609       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 610       goto fail;
 611    }
 612
 613    *major = 1;
 614    *minor = 4;
 615
 616    return EGL_TRUE;
 617
 618 fail:
 619    if (gdpy)
 620       egl_g3d_terminate(drv, dpy);
 621    return EGL_FALSE;
 622 }
 623
 624 static _EGLContext *
 625 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 626                        _EGLContext *share, const EGLint *attribs)
 627 {
 628    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 629    struct egl_g3d_context *gshare = egl_g3d_context(share);
 630    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 631    struct egl_g3d_context *gctx;
 632    const __GLcontextModes *mode;
 633
 634    gctx = CALLOC_STRUCT(egl_g3d_context);
 635    if (!gctx) {
 636       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 637       return NULL;
 638    }
 639
 640    if (!_eglInitContext(&gctx->base, dpy, conf, attribs)) {
 641       free(gctx);
 642       return NULL;
 643    }
 644
 645    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 646    if (!gctx->stapi) {
 647       free(gctx);
 648       return NULL;
 649    }
 650
 651    mode = &gconf->native->mode;
 652
 653    gctx->pipe = gdpy->native->screen->context_create(
 654       gdpy->native->screen,
 655       (void *) &gctx->base);
 656
 657    if (!gctx->pipe) {
 658       free(gctx);
 659       return NULL;
 660    }
 661
 662    gctx->st_ctx = gctx->stapi->st_create_context(gctx->pipe, mode,
 663                         (gshare) ? gshare->st_ctx : NULL);
 664    if (!gctx->st_ctx) {
 665       gctx->pipe->destroy(gctx->pipe);
 666       free(gctx);
 667       return NULL;
 668    }
 669
 670    return &gctx->base;
 671 }
 672
 673 /**
 674  * Destroy a context.
 675  */
 676 static void
 677 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 678 {
 679    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 680
 681    /* FIXME a context might live longer than its display */
 682    if (!dpy->Initialized)
 683       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 684
 685    egl_g3d_realloc_context(dpy, &gctx->base);
 686    /* it will destroy the associated pipe context */
 687    gctx->stapi->st_destroy_context(gctx->st_ctx);
 688
 689    free(gctx);
 690 }
 691
 692 static EGLBoolean
 693 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 694 {
 695    if (!_eglIsContextBound(ctx))
 696       destroy_context(dpy, ctx);
 697    return EGL_TRUE;
 698 }
 699
 700 struct egl_g3d_create_surface_arg {
 701    EGLint type;
 702    union {
 703       EGLNativeWindowType win;
 704       EGLNativePixmapType pix;
 705    } u;
 706 };
 707
 708 static _EGLSurface *
 709 egl_g3d_create_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 710                        struct egl_g3d_create_surface_arg *arg,
 711                        const EGLint *attribs)
 712 {
 713    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 714    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 715    struct egl_g3d_surface *gsurf;
 716    struct native_surface *nsurf;
 717    const char *err;
 718
 719    switch (arg->type) {
 720    case EGL_WINDOW_BIT:
 721       err = "eglCreateWindowSurface";
 722       break;
 723    case EGL_PIXMAP_BIT:
 724       err = "eglCreatePixmapSurface";
 725       break;
 726    case EGL_PBUFFER_BIT:
 727       err = "eglCreatePBufferSurface";
 728       break;
 729 #ifdef EGL_MESA_screen_surface
 730    case EGL_SCREEN_BIT_MESA:
 731       err = "eglCreateScreenSurface";
 732       break;
 733 #endif
 734    default:
 735       err = "eglCreateUnknownSurface";
 736       break;
 737    }
 738
 739    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 740    if (!gsurf) {
 741       _eglError(EGL_BAD_ALLOC, err);
 742       return NULL;
 743    }
 744
 745    if (!_eglInitSurface(&gsurf->base, dpy, arg->type, conf, attribs)) {
 746       free(gsurf);
 747       return NULL;
 748    }
 749
 750    /* create the native surface */
 751    switch (arg->type) {
 752    case EGL_WINDOW_BIT:
 753       nsurf = gdpy->native->create_window_surface(gdpy->native,
 754             arg->u.win, gconf->native);
 755       break;
 756    case EGL_PIXMAP_BIT:
 757       nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 758             arg->u.pix, gconf->native);
 759       break;
 760    case EGL_PBUFFER_BIT:
 761       nsurf = gdpy->native->create_pbuffer_surface(gdpy->native,
 762             gconf->native, gsurf->base.Width, gsurf->base.Height);
 763       break;
 764 #ifdef EGL_MESA_screen_surface
 765    case EGL_SCREEN_BIT_MESA:
 766       /* prefer back buffer (move to _eglInitSurface?) */
 767       gsurf->base.RenderBuffer = EGL_BACK_BUFFER;
 768       nsurf = gdpy->native->modeset->create_scanout_surface(gdpy->native,
 769             gconf->native, gsurf->base.Width, gsurf->base.Height);
 770       break;
 771 #endif
 772    default:
 773       nsurf = NULL;
 774       break;
 775    }
 776
 777    if (!nsurf) {
 778       free(gsurf);
 779       return NULL;
 780    }
 781    /* initialize the geometry */
 782    if (!nsurf->validate(nsurf, 0x0, &gsurf->sequence_number, NULL,
 783             &gsurf->base.Width, &gsurf->base.Height)) {
 784       nsurf->destroy(nsurf);
 785       free(gsurf);
 786       return NULL;
 787    }
 788
 789    nsurf->user_data = &gsurf->base;
 790    gsurf->native = nsurf;
 791
 792    gsurf->render_att = (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER) ?
 793       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 794    if (!gconf->native->mode.doubleBufferMode)
 795       gsurf->render_att = NATIVE_ATTACHMENT_FRONT_LEFT;
 796
 797    return &gsurf->base;
 798 }
 799
 800 static _EGLSurface *
 801 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 802                               _EGLConfig *conf, EGLNativeWindowType win,
 803                               const EGLint *attribs)
 804 {
 805    struct egl_g3d_create_surface_arg arg;
 806
 807    memset(&arg, 0, sizeof(arg));
 808    arg.type = EGL_WINDOW_BIT;
 809    arg.u.win = win;
 810
 811    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 812 }
 813
 814 static _EGLSurface *
 815 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 816                               _EGLConfig *conf, EGLNativePixmapType pix,
 817                               const EGLint *attribs)
 818 {
 819    struct egl_g3d_create_surface_arg arg;
 820
 821    memset(&arg, 0, sizeof(arg));
 822    arg.type = EGL_PIXMAP_BIT;
 823    arg.u.pix = pix;
 824
 825    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 826 }
 827
 828 static _EGLSurface *
 829 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 830                                _EGLConfig *conf, const EGLint *attribs)
 831 {
 832    struct egl_g3d_create_surface_arg arg;
 833
 834    memset(&arg, 0, sizeof(arg));
 835    arg.type = EGL_PBUFFER_BIT;
 836
 837    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 838 }
 839
 840 /**
 841  * Destroy a surface.
 842  */
 843 static void
 844 destroy_surface(_EGLDisplay *dpy, _EGLSurface *surf)
 845 {
 846    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 847
 848    /* FIXME a surface might live longer than its display */
 849    if (!dpy->Initialized)
 850       _eglLog(_EGL_FATAL, "destroy a surface with an unitialized display");
 851
 852    pipe_surface_reference(&gsurf->render_surface, NULL);
 853    gsurf->native->destroy(gsurf->native);
 854    free(gsurf);
 855 }
 856
 857 static EGLBoolean
 858 egl_g3d_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 859 {
 860    if (!_eglIsSurfaceBound(surf))
 861       destroy_surface(dpy, surf);
 862    return EGL_TRUE;
 863 }
 864
 865 static EGLBoolean
 866 egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
 867                      _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx)
 868 {
 869    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 870    struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 871    struct egl_g3d_context *old_gctx;
 872    EGLBoolean ok = EGL_TRUE;
 873
 874    /* bind the new context and return the "orphaned" one */
 875    if (!_eglBindContext(&ctx, &draw, &read))
 876       return EGL_FALSE;
 877    old_gctx = egl_g3d_context(ctx);
 878
 879    if (old_gctx) {
 880       /* flush old context */
 881       old_gctx->stapi->st_flush(old_gctx->st_ctx,
 882             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 883
 884       /*
 885        * The old context is no longer current, and egl_g3d_realloc_context()
 886        * should be called to destroy the framebuffers.  However, it is possible
 887        * that it will be made current again with the same draw/read surfaces.
 888        * It might be better to keep it around.
 889        */
 890    }
 891
 892    if (gctx) {
 893       ok = egl_g3d_realloc_context(dpy, &gctx->base);
 894       if (ok) {
 895          /* XXX: need to pass the winsys argument for
 896           * flush_frontbuffer in the fourth parameter here:
 897           */
 898          ok = gctx->stapi->st_make_current(gctx->st_ctx,
 899                                            gctx->draw.st_fb,
 900                                            gctx->read.st_fb,
 901                                            NULL);
 902          if (ok) {
 903             egl_g3d_validate_context(dpy, &gctx->base);
 904             if (gdraw->base.Type == EGL_WINDOW_BIT) {
 905                gctx->base.WindowRenderBuffer =
 906                   (gdraw->render_att == NATIVE_ATTACHMENT_FRONT_LEFT) ?
 907                   EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 908             }
 909          }
 910       }
 911    }
 912    else if (old_gctx) {
 913       ok = old_gctx->stapi->st_make_current(NULL, NULL, NULL, NULL);
 914       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 915    }
 916
 917    if (ctx && !_eglIsContextLinked(ctx))
 918       destroy_context(dpy, ctx);
 919    if (draw && !_eglIsSurfaceLinked(draw))
 920       destroy_surface(dpy, draw);
 921    if (read && read != draw && !_eglIsSurfaceLinked(read))
 922       destroy_surface(dpy, read);
 923
 924    return ok;
 925 }
 926
 927 static EGLBoolean
 928 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 929 {
 930    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 931    _EGLContext *ctx = _eglGetCurrentContext();
 932    struct egl_g3d_context *gctx = NULL;
 933
 934    /* no-op for pixmap or pbuffer surface */
 935    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 936        gsurf->base.Type == EGL_PBUFFER_BIT)
 937       return EGL_TRUE;
 938
 939    /* or when the surface is single-buffered */
 940    if (gsurf->render_att == NATIVE_ATTACHMENT_FRONT_LEFT)
 941       return EGL_TRUE;
 942
 943    if (ctx && ctx->DrawSurface == surf)
 944       gctx = egl_g3d_context(ctx);
 945
 946    /* flush if the surface is current */
 947    if (gctx)
 948       gctx->stapi->st_notify_swapbuffers(gctx->draw.st_fb);
 949
 950    return gsurf->native->swap_buffers(gsurf->native);
 951 }
 952
 953 /**
 954  * Find a config that supports the pixmap.
 955  */
 956 _EGLConfig *
 957 egl_g3d_find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 958 {
 959    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 960    struct egl_g3d_config *gconf;
 961    EGLint i;
 962
 963    for (i = 0; i < dpy->NumConfigs; i++) {
 964       gconf = egl_g3d_config(dpy->Configs[i]);
 965       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 966          break;
 967    }
 968
 969    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 970 }
 971
 972 /**
 973  * Get the pipe surface of the given attachment of the native surface.
 974  */
 975 static struct pipe_surface *
 976 get_pipe_surface(struct native_display *ndpy, struct native_surface *nsurf,
 977                  enum native_attachment natt)
 978 {
 979    struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
 980    struct pipe_surface *psurf;
 981
 982    textures[natt] = NULL;
 983    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 984    if (!textures[natt])
 985       return NULL;
 986
 987    psurf = ndpy->screen->get_tex_surface(ndpy->screen, textures[natt],
 988          0, 0, 0, PIPE_BUFFER_USAGE_CPU_WRITE);
 989    pipe_texture_reference(&textures[natt], NULL);
 990
 991    return psurf;
 992 }
 993
 994 static EGLBoolean
 995 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 996                      EGLNativePixmapType target)
 997 {
 998    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 999    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1000    _EGLContext *ctx = _eglGetCurrentContext();
1001    struct egl_g3d_config *gconf;
1002    struct native_surface *nsurf;
1003    struct pipe_screen *screen = gdpy->native->screen;
1004    struct pipe_surface *psurf;
1005
1006    if (!gsurf->render_surface)
1007       return EGL_TRUE;
1008
1009    gconf = egl_g3d_config(egl_g3d_find_pixmap_config(dpy, target));
1010    if (!gconf)
1011       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1012
1013    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
1014          target, gconf->native);
1015    if (!nsurf)
1016       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1017
1018    /* flush if the surface is current */
1019    if (ctx && ctx->DrawSurface == &gsurf->base) {
1020       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1021       gctx->stapi->st_flush(gctx->st_ctx,
1022             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1023    }
1024
1025    psurf = get_pipe_surface(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
1026    if (psurf) {
1027       struct pipe_context pipe;
1028
1029       /**
1030        * XXX This is hacky.  If we might allow the EGLDisplay to create a pipe
1031        * context of its own and use the blitter context for this.
1032        */
1033       memset(&pipe, 0, sizeof(pipe));
1034       pipe.screen = screen;
1035
1036       util_surface_copy(&pipe, FALSE, psurf, 0, 0,
1037             gsurf->render_surface, 0, 0, psurf->width, psurf->height);
1038
1039       pipe_surface_reference(&psurf, NULL);
1040       nsurf->flush_frontbuffer(nsurf);
1041    }
1042
1043    nsurf->destroy(nsurf);
1044
1045    return EGL_TRUE;
1046 }
1047
1048 static EGLBoolean
1049 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
1050 {
1051    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1052    gctx->stapi->st_finish(gctx->st_ctx);
1053    return EGL_TRUE;
1054 }
1055
1056 static EGLBoolean
1057 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
1058 {
1059    _EGLContext *ctx = _eglGetCurrentContext();
1060
1061    if (engine != EGL_CORE_NATIVE_ENGINE)
1062       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
1063
1064    if (ctx && ctx->DrawSurface) {
1065       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
1066       gsurf->native->wait(gsurf->native);
1067    }
1068
1069    return EGL_TRUE;
1070 }
1071
1072 static _EGLProc
1073 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
1074 {
1075    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1076    _EGLProc proc;
1077    EGLint i;
1078
1079    /* in case this is called before a display is initialized */
1080    egl_g3d_init_st(&gdrv->base);
1081
1082    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
1083       const struct egl_g3d_st *stapi = gdrv->stapis[i];
1084       if (stapi) {
1085          proc = (_EGLProc) stapi->st_get_proc_address(procname);
1086          if (proc)
1087             return proc;
1088       }
1089    }
1090
1091    return (_EGLProc) NULL;
1092 }
1093
1094 static EGLBoolean
1095 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1096                        _EGLSurface *surf, EGLint buffer)
1097 {
1098    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1099    _EGLContext *es1 = _eglGetAPIContext(EGL_OPENGL_ES_API);
1100    struct egl_g3d_context *gctx;
1101    enum pipe_format target_format;
1102    int target;
1103
1104    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
1105       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
1106    if (buffer != EGL_BACK_BUFFER)
1107       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
1108    if (gsurf->base.BoundToTexture)
1109       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
1110
1111    switch (gsurf->base.TextureFormat) {
1112    case EGL_TEXTURE_RGB:
1113       target_format = PIPE_FORMAT_R8G8B8_UNORM;
1114       break;
1115    case EGL_TEXTURE_RGBA:
1116       target_format = PIPE_FORMAT_B8G8R8A8_UNORM;
1117       break;
1118    default:
1119       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1120    }
1121
1122    switch (gsurf->base.TextureTarget) {
1123    case EGL_TEXTURE_2D:
1124       target = ST_TEXTURE_2D;
1125       break;
1126    default:
1127       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1128    }
1129
1130    if (!es1)
1131       return EGL_TRUE;
1132    if (!gsurf->render_surface)
1133       return EGL_FALSE;
1134
1135    /* flush properly if the surface is bound */
1136    if (gsurf->base.CurrentContext) {
1137       gctx = egl_g3d_context(gsurf->base.CurrentContext);
1138       gctx->stapi->st_flush(gctx->st_ctx,
1139             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1140    }
1141
1142    gctx = egl_g3d_context(es1);
1143    gctx->stapi->st_bind_texture_surface(gsurf->render_surface,
1144          target, gsurf->base.MipmapLevel, target_format);
1145
1146    gsurf->base.BoundToTexture = EGL_TRUE;
1147
1148    return EGL_TRUE;
1149 }
1150
1151 static EGLBoolean
1152 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1153                           _EGLSurface *surf, EGLint buffer)
1154 {
1155    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1156
1157    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
1158        !gsurf->base.BoundToTexture)
1159       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
1160    if (buffer != EGL_BACK_BUFFER)
1161       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
1162
1163    if (gsurf->render_surface) {
1164       _EGLContext *ctx = _eglGetAPIContext(EGL_OPENGL_ES_API);
1165       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1166
1167       /* what if the context the surface binds to is no longer current? */
1168       if (gctx)
1169          gctx->stapi->st_unbind_texture_surface(gsurf->render_surface,
1170                ST_TEXTURE_2D, gsurf->base.MipmapLevel);
1171    }
1172
1173    gsurf->base.BoundToTexture = EGL_FALSE;
1174
1175    return EGL_TRUE;
1176 }
1177
1178 #ifdef EGL_MESA_screen_surface
1179
1180 static _EGLSurface *
1181 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1182                               _EGLConfig *conf, const EGLint *attribs)
1183 {
1184    struct egl_g3d_create_surface_arg arg;
1185
1186    memset(&arg, 0, sizeof(arg));
1187    arg.type = EGL_SCREEN_BIT_MESA;
1188
1189    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
1190 }
1191
1192 static EGLBoolean
1193 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1194                             _EGLScreen *scr, _EGLSurface *surf,
1195                             _EGLMode *mode)
1196 {
1197    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1198    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
1199    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1200    struct native_surface *nsurf;
1201    const struct native_mode *nmode;
1202    EGLBoolean changed;
1203
1204    if (gsurf) {
1205       EGLint idx;
1206
1207       if (!mode)
1208          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1209       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
1210          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
1211       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
1212          return _eglError(EGL_BAD_MATCH,
1213                "eglShowSurfaceMESA(surface smaller than mode size)");
1214
1215       /* find the index of the mode */
1216       for (idx = 0; idx < gscr->base.NumModes; idx++)
1217          if (mode == &gscr->base.Modes[idx])
1218             break;
1219       if (idx >= gscr->base.NumModes) {
1220          return _eglError(EGL_BAD_MODE_MESA,
1221                "eglShowSurfaceMESA(unknown mode)");
1222       }
1223
1224       nsurf = gsurf->native;
1225       nmode = gscr->native_modes[idx];
1226    }
1227    else {
1228       if (mode)
1229          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1230
1231       /* disable the screen */
1232       nsurf = NULL;
1233       nmode = NULL;
1234    }
1235
1236    /* TODO surface panning by CRTC choosing */
1237    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
1238          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
1239    if (changed) {
1240       gscr->base.CurrentSurface = &gsurf->base;
1241       gscr->base.CurrentMode = mode;
1242    }
1243
1244    return changed;
1245 }
1246
1247 #endif /* EGL_MESA_screen_surface */
1248
1249 static EGLint
1250 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
1251 {
1252    struct native_probe *nprobe;
1253    enum native_probe_result res;
1254    EGLint score;
1255
1256    nprobe = egl_g3d_get_probe(drv, dpy);
1257    res = native_get_probe_result(nprobe);
1258
1259    switch (res) {
1260    case NATIVE_PROBE_UNKNOWN:
1261    default:
1262       score = 0;
1263       break;
1264    case NATIVE_PROBE_FALLBACK:
1265       score = 40;
1266       break;
1267    case NATIVE_PROBE_SUPPORTED:
1268       score = 50;
1269       break;
1270    case NATIVE_PROBE_EXACT:
1271       score = 100;
1272       break;
1273    }
1274
1275    return score;
1276 }
1277
1278 static void
1279 egl_g3d_unload(_EGLDriver *drv)
1280 {
1281    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1282
1283    egl_g3d_destroy_probe(drv, NULL);
1284    free(gdrv);
1285 }
1286
1287 _EGLDriver *
1288 _eglMain(const char *args)
1289 {
1290    static char driver_name[64];
1291    struct egl_g3d_driver *gdrv;
1292
1293    snprintf(driver_name, sizeof(driver_name),
1294          "Gallium/%s", native_get_name());
1295
1296    gdrv = CALLOC_STRUCT(egl_g3d_driver);
1297    if (!gdrv)
1298       return NULL;
1299
1300    _eglInitDriverFallbacks(&gdrv->base);
1301
1302    gdrv->base.API.Initialize = egl_g3d_initialize;
1303    gdrv->base.API.Terminate = egl_g3d_terminate;
1304    gdrv->base.API.CreateContext = egl_g3d_create_context;
1305    gdrv->base.API.DestroyContext = egl_g3d_destroy_context;
1306    gdrv->base.API.CreateWindowSurface = egl_g3d_create_window_surface;
1307    gdrv->base.API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
1308    gdrv->base.API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
1309    gdrv->base.API.DestroySurface = egl_g3d_destroy_surface;
1310    gdrv->base.API.MakeCurrent = egl_g3d_make_current;
1311    gdrv->base.API.SwapBuffers = egl_g3d_swap_buffers;
1312    gdrv->base.API.CopyBuffers = egl_g3d_copy_buffers;
1313    gdrv->base.API.WaitClient = egl_g3d_wait_client;
1314    gdrv->base.API.WaitNative = egl_g3d_wait_native;
1315    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
1316
1317    gdrv->base.API.BindTexImage = egl_g3d_bind_tex_image;
1318    gdrv->base.API.ReleaseTexImage = egl_g3d_release_tex_image;
1319
1320    gdrv->base.API.CreateImageKHR = egl_g3d_create_image;
1321    gdrv->base.API.DestroyImageKHR = egl_g3d_destroy_image;
1322
1323 #ifdef EGL_MESA_screen_surface
1324    gdrv->base.API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
1325    gdrv->base.API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
1326 #endif
1327
1328    gdrv->base.Name = driver_name;
1329    gdrv->base.Probe = egl_g3d_probe;
1330    gdrv->base.Unload = egl_g3d_unload;
1331
1332    /* the key is " EGL G3D" */
1333    gdrv->probe_key = 0x0E61063D;
1334
1335    return &gdrv->base;
1336 }