src/gallium/state_trackers/egl/common/egl_g3d_api.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   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 OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "egldriver.h"
  27 #include "eglcurrent.h"
  28 #include "egllog.h"
  29
  30 #include "pipe/p_screen.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_inlines.h"
  33
  34 #include "egl_g3d.h"
  35 #include "egl_g3d_api.h"
  36 #include "egl_g3d_image.h"
  37 #include "egl_g3d_st.h"
  38 #include "native.h"
  39
  40 /**
  41  * Return the state tracker for the given context.
  42  */
  43 static struct st_api *
  44 egl_g3d_choose_st(_EGLDriver *drv, _EGLContext *ctx)
  45 {
  46    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
  47    struct st_api *stapi;
  48    EGLint idx = -1;
  49
  50    switch (ctx->ClientAPI) {
  51    case EGL_OPENGL_ES_API:
  52       switch (ctx->ClientVersion) {
  53       case 1:
  54          idx = ST_API_OPENGL_ES1;
  55          break;
  56       case 2:
  57          idx = ST_API_OPENGL_ES2;
  58          break;
  59       default:
  60          _eglLog(_EGL_WARNING, "unknown client version %d",
  61                ctx->ClientVersion);
  62          break;
  63       }
  64       break;
  65    case EGL_OPENVG_API:
  66       idx = ST_API_OPENVG;
  67       break;
  68    case EGL_OPENGL_API:
  69       idx = ST_API_OPENGL;
  70       break;
  71    default:
  72       _eglLog(_EGL_WARNING, "unknown client API 0x%04x", ctx->ClientAPI);
  73       break;
  74    }
  75
  76    stapi = (idx >= 0) ? gdrv->stapis[idx] : NULL;
  77    return stapi;
  78 }
  79
  80 static _EGLContext *
  81 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
  82                        _EGLContext *share, const EGLint *attribs)
  83 {
  84    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
  85    struct egl_g3d_context *gshare = egl_g3d_context(share);
  86    struct egl_g3d_config *gconf = egl_g3d_config(conf);
  87    struct egl_g3d_context *gctx;
  88
  89    gctx = CALLOC_STRUCT(egl_g3d_context);
  90    if (!gctx) {
  91       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
  92       return NULL;
  93    }
  94
  95    if (!_eglInitContext(&gctx->base, dpy, conf, attribs)) {
  96       FREE(gctx);
  97       return NULL;
  98    }
  99
 100    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 101    if (!gctx->stapi) {
 102       FREE(gctx);
 103       return NULL;
 104    }
 105
 106    gctx->stctxi = gctx->stapi->create_context(gctx->stapi, gdpy->smapi,
 107          &gconf->stvis, (gshare) ? gshare->stctxi : NULL);
 108    if (!gctx->stctxi) {
 109       FREE(gctx);
 110       return NULL;
 111    }
 112
 113    gctx->stctxi->st_manager_private = (void *) &gctx->base;
 114
 115    return &gctx->base;
 116 }
 117
 118 /**
 119  * Destroy a context.
 120  */
 121 static void
 122 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 123 {
 124    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 125
 126    /* FIXME a context might live longer than its display */
 127    if (!dpy->Initialized)
 128       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 129
 130    gctx->stctxi->destroy(gctx->stctxi);
 131
 132    FREE(gctx);
 133 }
 134
 135 static EGLBoolean
 136 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 137 {
 138    if (!_eglIsContextBound(ctx))
 139       destroy_context(dpy, ctx);
 140    return EGL_TRUE;
 141 }
 142
 143 struct egl_g3d_create_surface_arg {
 144    EGLint type;
 145    union {
 146       EGLNativeWindowType win;
 147       EGLNativePixmapType pix;
 148    } u;
 149 };
 150
 151 static _EGLSurface *
 152 egl_g3d_create_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 153                        struct egl_g3d_create_surface_arg *arg,
 154                        const EGLint *attribs)
 155 {
 156    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 157    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 158    struct egl_g3d_surface *gsurf;
 159    struct native_surface *nsurf;
 160    const char *err;
 161
 162    switch (arg->type) {
 163    case EGL_WINDOW_BIT:
 164       err = "eglCreateWindowSurface";
 165       break;
 166    case EGL_PIXMAP_BIT:
 167       err = "eglCreatePixmapSurface";
 168       break;
 169 #ifdef EGL_MESA_screen_surface
 170    case EGL_SCREEN_BIT_MESA:
 171       err = "eglCreateScreenSurface";
 172       break;
 173 #endif
 174    default:
 175       err = "eglCreateUnknownSurface";
 176       break;
 177    }
 178
 179    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 180    if (!gsurf) {
 181       _eglError(EGL_BAD_ALLOC, err);
 182       return NULL;
 183    }
 184
 185    if (!_eglInitSurface(&gsurf->base, dpy, arg->type, conf, attribs)) {
 186       FREE(gsurf);
 187       return NULL;
 188    }
 189
 190    /* create the native surface */
 191    switch (arg->type) {
 192    case EGL_WINDOW_BIT:
 193       nsurf = gdpy->native->create_window_surface(gdpy->native,
 194             arg->u.win, gconf->native);
 195       break;
 196    case EGL_PIXMAP_BIT:
 197       nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 198             arg->u.pix, gconf->native);
 199       break;
 200 #ifdef EGL_MESA_screen_surface
 201    case EGL_SCREEN_BIT_MESA:
 202       /* prefer back buffer (move to _eglInitSurface?) */
 203       gsurf->base.RenderBuffer = EGL_BACK_BUFFER;
 204       nsurf = gdpy->native->modeset->create_scanout_surface(gdpy->native,
 205             gconf->native, gsurf->base.Width, gsurf->base.Height);
 206       break;
 207 #endif
 208    default:
 209       nsurf = NULL;
 210       break;
 211    }
 212
 213    if (!nsurf) {
 214       FREE(gsurf);
 215       return NULL;
 216    }
 217    /* initialize the geometry */
 218    if (!nsurf->validate(nsurf, 0x0, &gsurf->sequence_number, NULL,
 219             &gsurf->base.Width, &gsurf->base.Height)) {
 220       nsurf->destroy(nsurf);
 221       FREE(gsurf);
 222       return NULL;
 223    }
 224
 225    gsurf->stvis = gconf->stvis;
 226    if (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER)
 227       gsurf->stvis.render_buffer = ST_ATTACHMENT_FRONT_LEFT;
 228
 229    gsurf->stfbi = egl_g3d_create_st_framebuffer(&gsurf->base);
 230    if (!gsurf->stfbi) {
 231       nsurf->destroy(nsurf);
 232       FREE(gsurf);
 233       return NULL;
 234    }
 235
 236    nsurf->user_data = &gsurf->base;
 237    gsurf->native = nsurf;
 238
 239    return &gsurf->base;
 240 }
 241
 242 static _EGLSurface *
 243 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 244                               _EGLConfig *conf, EGLNativeWindowType win,
 245                               const EGLint *attribs)
 246 {
 247    struct egl_g3d_create_surface_arg arg;
 248
 249    memset(&arg, 0, sizeof(arg));
 250    arg.type = EGL_WINDOW_BIT;
 251    arg.u.win = win;
 252
 253    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 254 }
 255
 256 static _EGLSurface *
 257 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 258                               _EGLConfig *conf, EGLNativePixmapType pix,
 259                               const EGLint *attribs)
 260 {
 261    struct egl_g3d_create_surface_arg arg;
 262
 263    memset(&arg, 0, sizeof(arg));
 264    arg.type = EGL_PIXMAP_BIT;
 265    arg.u.pix = pix;
 266
 267    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 268 }
 269
 270 static _EGLSurface *
 271 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 272                                _EGLConfig *conf, const EGLint *attribs)
 273 {
 274    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 275    struct egl_g3d_surface *gsurf;
 276
 277    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 278    if (!gsurf) {
 279       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
 280       return NULL;
 281    }
 282
 283    if (!_eglInitSurface(&gsurf->base, dpy, EGL_PBUFFER_BIT, conf, attribs)) {
 284       FREE(gsurf);
 285       return NULL;
 286    }
 287
 288    gsurf->stvis = gconf->stvis;
 289
 290    gsurf->stfbi = egl_g3d_create_st_framebuffer(&gsurf->base);
 291    if (!gsurf->stfbi) {
 292       FREE(gsurf);
 293       return NULL;
 294    }
 295
 296    return &gsurf->base;
 297 }
 298
 299 /**
 300  * Destroy a surface.
 301  */
 302 static void
 303 destroy_surface(_EGLDisplay *dpy, _EGLSurface *surf)
 304 {
 305    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 306
 307    /* FIXME a surface might live longer than its display */
 308    if (!dpy->Initialized)
 309       _eglLog(_EGL_FATAL, "destroy a surface with an unitialized display");
 310
 311    pipe_resource_reference(&gsurf->render_texture, NULL);
 312    egl_g3d_destroy_st_framebuffer(gsurf->stfbi);
 313    if (gsurf->native)
 314       gsurf->native->destroy(gsurf->native);
 315    FREE(gsurf);
 316 }
 317
 318 static EGLBoolean
 319 egl_g3d_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 320 {
 321    if (!_eglIsSurfaceBound(surf))
 322       destroy_surface(dpy, surf);
 323    return EGL_TRUE;
 324 }
 325
 326 static EGLBoolean
 327 egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
 328                      _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx)
 329 {
 330    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 331    struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 332    struct egl_g3d_surface *gread = egl_g3d_surface(read);
 333    struct egl_g3d_context *old_gctx;
 334    EGLBoolean ok = EGL_TRUE;
 335
 336    /* bind the new context and return the "orphaned" one */
 337    if (!_eglBindContext(&ctx, &draw, &read))
 338       return EGL_FALSE;
 339    old_gctx = egl_g3d_context(ctx);
 340
 341    if (old_gctx) {
 342       /* flush old context */
 343       old_gctx->stctxi->flush(old_gctx->stctxi,
 344             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 345    }
 346
 347    if (gctx) {
 348       ok = gctx->stapi->make_current(gctx->stapi, gctx->stctxi,
 349             (gdraw) ? gdraw->stfbi : NULL, (gread) ? gread->stfbi : NULL);
 350       if (ok) {
 351          gctx->stctxi->notify_invalid_framebuffer(gctx->stctxi, gdraw->stfbi);
 352          if (gread != gdraw) {
 353             gctx->stctxi->notify_invalid_framebuffer(gctx->stctxi,
 354                   gread->stfbi);
 355          }
 356
 357          if (gdraw->base.Type == EGL_WINDOW_BIT) {
 358             gctx->base.WindowRenderBuffer =
 359                (gdraw->stvis.render_buffer == ST_ATTACHMENT_FRONT_LEFT) ?
 360                EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 361          }
 362       }
 363    }
 364    else if (old_gctx) {
 365       ok = old_gctx->stapi->make_current(old_gctx->stapi, NULL, NULL, NULL);
 366       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 367    }
 368
 369    if (ctx && !_eglIsContextLinked(ctx))
 370       destroy_context(dpy, ctx);
 371    if (draw && !_eglIsSurfaceLinked(draw))
 372       destroy_surface(dpy, draw);
 373    if (read && read != draw && !_eglIsSurfaceLinked(read))
 374       destroy_surface(dpy, read);
 375
 376    return ok;
 377 }
 378
 379 static EGLBoolean
 380 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 381 {
 382    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 383    _EGLContext *ctx = _eglGetCurrentContext();
 384    struct egl_g3d_context *gctx = NULL;
 385
 386    /* no-op for pixmap or pbuffer surface */
 387    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 388        gsurf->base.Type == EGL_PBUFFER_BIT)
 389       return EGL_TRUE;
 390
 391    /* or when the surface is single-buffered */
 392    if (gsurf->stvis.render_buffer == ST_ATTACHMENT_FRONT_LEFT)
 393       return EGL_TRUE;
 394
 395    if (ctx && ctx->DrawSurface == surf)
 396       gctx = egl_g3d_context(ctx);
 397
 398    /* flush if the surface is current */
 399    if (gctx) {
 400       gctx->stctxi->flush(gctx->stctxi,
 401             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 402    }
 403
 404    return gsurf->native->swap_buffers(gsurf->native);
 405 }
 406
 407 /**
 408  * Get the pipe surface of the given attachment of the native surface.
 409  */
 410 static struct pipe_resource *
 411 get_pipe_resource(struct native_display *ndpy, struct native_surface *nsurf,
 412                   enum native_attachment natt)
 413 {
 414    struct pipe_resource *textures[NUM_NATIVE_ATTACHMENTS];
 415
 416    textures[natt] = NULL;
 417    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 418
 419    return textures[natt];
 420 }
 421
 422 static EGLBoolean
 423 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 424                      EGLNativePixmapType target)
 425 {
 426    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 427    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 428    _EGLContext *ctx = _eglGetCurrentContext();
 429    struct egl_g3d_config *gconf;
 430    struct native_surface *nsurf;
 431    struct pipe_screen *screen = gdpy->native->screen;
 432    struct pipe_resource *ptex;
 433
 434    if (!gsurf->render_texture)
 435       return EGL_TRUE;
 436
 437    gconf = egl_g3d_config(egl_g3d_find_pixmap_config(dpy, target));
 438    if (!gconf)
 439       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
 440
 441    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 442          target, gconf->native);
 443    if (!nsurf)
 444       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
 445
 446    /* flush if the surface is current */
 447    if (ctx && ctx->DrawSurface == &gsurf->base) {
 448       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 449       gctx->stctxi->flush(gctx->stctxi,
 450             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 451    }
 452
 453    /* create a pipe context to copy surfaces */
 454    if (!gdpy->pipe) {
 455       gdpy->pipe =
 456          gdpy->native->screen->context_create(gdpy->native->screen, NULL);
 457       if (!gdpy->pipe)
 458          return EGL_FALSE;
 459    }
 460
 461    ptex = get_pipe_resource(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
 462    if (ptex) {
 463       struct pipe_surface *psrc;
 464       struct pipe_subresource subsrc, subdst;
 465       subsrc.face = 0;
 466       subsrc.level = 0;
 467       subdst.face = 0;
 468       subdst.level = 0;
 469
 470       if (psrc) {
 471          gdpy->pipe->resource_copy_region(gdpy->pipe, ptex, subdst, 0, 0, 0,
 472                gsurf->render_texture, subsrc, 0, 0, 0, ptex->width0, ptex->height0);
 473
 474          nsurf->flush_frontbuffer(nsurf);
 475       }
 476
 477       pipe_resource_reference(&ptex, NULL);
 478    }
 479
 480    nsurf->destroy(nsurf);
 481
 482    return EGL_TRUE;
 483 }
 484
 485 static EGLBoolean
 486 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 487 {
 488    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 489    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 490    struct pipe_screen *screen = gdpy->native->screen;
 491    struct pipe_fence_handle *fence = NULL;
 492
 493    gctx->stctxi->flush(gctx->stctxi,
 494          PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
 495    screen->fence_finish(screen, fence, 0);
 496    screen->fence_reference(screen, &fence, NULL);
 497
 498    return EGL_TRUE;
 499 }
 500
 501 static EGLBoolean
 502 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
 503 {
 504    _EGLContext *ctx = _eglGetCurrentContext();
 505
 506    if (engine != EGL_CORE_NATIVE_ENGINE)
 507       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
 508
 509    if (ctx && ctx->DrawSurface) {
 510       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
 511
 512       if (gsurf->native)
 513          gsurf->native->wait(gsurf->native);
 514    }
 515
 516    return EGL_TRUE;
 517 }
 518
 519 static EGLBoolean
 520 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
 521                        _EGLSurface *surf, EGLint buffer)
 522 {
 523    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 524    _EGLContext *es1 = _eglGetAPIContext(EGL_OPENGL_ES_API);
 525    struct egl_g3d_context *gctx;
 526    enum pipe_format internal_format;
 527    enum st_texture_type target;
 528
 529    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
 530       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
 531    if (buffer != EGL_BACK_BUFFER)
 532       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
 533    if (gsurf->base.BoundToTexture)
 534       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
 535
 536    switch (gsurf->base.TextureFormat) {
 537    case EGL_TEXTURE_RGB:
 538       internal_format = PIPE_FORMAT_R8G8B8_UNORM;
 539       break;
 540    case EGL_TEXTURE_RGBA:
 541       internal_format = PIPE_FORMAT_B8G8R8A8_UNORM;
 542       break;
 543    default:
 544       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
 545    }
 546
 547    switch (gsurf->base.TextureTarget) {
 548    case EGL_TEXTURE_2D:
 549       target = ST_TEXTURE_2D;
 550       break;
 551    default:
 552       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
 553    }
 554
 555    if (!es1)
 556       return EGL_TRUE;
 557    if (!gsurf->render_texture)
 558       return EGL_FALSE;
 559
 560    /* flush properly if the surface is bound */
 561    if (gsurf->base.CurrentContext) {
 562       gctx = egl_g3d_context(gsurf->base.CurrentContext);
 563       gctx->stctxi->flush(gctx->stctxi,
 564             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 565    }
 566
 567    gctx = egl_g3d_context(es1);
 568    if (gctx->stctxi->teximage) {
 569       if (!gctx->stctxi->teximage(gctx->stctxi, target,
 570                gsurf->base.MipmapLevel, internal_format,
 571                gsurf->render_texture, gsurf->base.MipmapTexture))
 572          return EGL_FALSE;
 573       gsurf->base.BoundToTexture = EGL_TRUE;
 574    }
 575
 576    return EGL_TRUE;
 577 }
 578
 579 static EGLBoolean
 580 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
 581                           _EGLSurface *surf, EGLint buffer)
 582 {
 583    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 584
 585    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
 586        !gsurf->base.BoundToTexture)
 587       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
 588    if (buffer != EGL_BACK_BUFFER)
 589       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
 590
 591    if (gsurf->render_texture) {
 592       _EGLContext *ctx = _eglGetAPIContext(EGL_OPENGL_ES_API);
 593       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 594
 595       /* what if the context the surface binds to is no longer current? */
 596       if (gctx) {
 597          gctx->stctxi->teximage(gctx->stctxi, ST_TEXTURE_2D,
 598                gsurf->base.MipmapLevel, PIPE_FORMAT_NONE, NULL, FALSE);
 599       }
 600    }
 601
 602    gsurf->base.BoundToTexture = EGL_FALSE;
 603
 604    return EGL_TRUE;
 605 }
 606
 607 #ifdef EGL_MESA_screen_surface
 608
 609 static _EGLSurface *
 610 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 611                               _EGLConfig *conf, const EGLint *attribs)
 612 {
 613    struct egl_g3d_create_surface_arg arg;
 614
 615    memset(&arg, 0, sizeof(arg));
 616    arg.type = EGL_SCREEN_BIT_MESA;
 617
 618    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 619 }
 620
 621 static EGLBoolean
 622 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 623                             _EGLScreen *scr, _EGLSurface *surf,
 624                             _EGLMode *mode)
 625 {
 626    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 627    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
 628    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 629    struct native_surface *nsurf;
 630    const struct native_mode *nmode;
 631    EGLBoolean changed;
 632
 633    if (gsurf) {
 634       EGLint idx;
 635
 636       if (!mode)
 637          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
 638       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
 639          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
 640       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
 641          return _eglError(EGL_BAD_MATCH,
 642                "eglShowSurfaceMESA(surface smaller than mode size)");
 643
 644       /* find the index of the mode */
 645       for (idx = 0; idx < gscr->base.NumModes; idx++)
 646          if (mode == &gscr->base.Modes[idx])
 647             break;
 648       if (idx >= gscr->base.NumModes) {
 649          return _eglError(EGL_BAD_MODE_MESA,
 650                "eglShowSurfaceMESA(unknown mode)");
 651       }
 652
 653       nsurf = gsurf->native;
 654       nmode = gscr->native_modes[idx];
 655    }
 656    else {
 657       if (mode)
 658          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
 659
 660       /* disable the screen */
 661       nsurf = NULL;
 662       nmode = NULL;
 663    }
 664
 665    /* TODO surface panning by CRTC choosing */
 666    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
 667          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
 668    if (changed) {
 669       gscr->base.CurrentSurface = &gsurf->base;
 670       gscr->base.CurrentMode = mode;
 671    }
 672
 673    return changed;
 674 }
 675
 676 #endif /* EGL_MESA_screen_surface */
 677
 678 /**
 679  * Find a config that supports the pixmap.
 680  */
 681 _EGLConfig *
 682 egl_g3d_find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 683 {
 684    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 685    struct egl_g3d_config *gconf;
 686    EGLint i;
 687
 688    for (i = 0; i < dpy->NumConfigs; i++) {
 689       gconf = egl_g3d_config(dpy->Configs[i]);
 690       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 691          break;
 692    }
 693
 694    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 695 }
 696
 697 void
 698 egl_g3d_init_driver_api(_EGLDriver *drv)
 699 {
 700    _eglInitDriverFallbacks(drv);
 701
 702    drv->API.CreateContext = egl_g3d_create_context;
 703    drv->API.DestroyContext = egl_g3d_destroy_context;
 704    drv->API.CreateWindowSurface = egl_g3d_create_window_surface;
 705    drv->API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
 706    drv->API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
 707    drv->API.DestroySurface = egl_g3d_destroy_surface;
 708    drv->API.MakeCurrent = egl_g3d_make_current;
 709    drv->API.SwapBuffers = egl_g3d_swap_buffers;
 710    drv->API.CopyBuffers = egl_g3d_copy_buffers;
 711    drv->API.WaitClient = egl_g3d_wait_client;
 712    drv->API.WaitNative = egl_g3d_wait_native;
 713
 714    drv->API.BindTexImage = egl_g3d_bind_tex_image;
 715    drv->API.ReleaseTexImage = egl_g3d_release_tex_image;
 716
 717    drv->API.CreateImageKHR = egl_g3d_create_image;
 718    drv->API.DestroyImageKHR = egl_g3d_destroy_image;
 719
 720 #ifdef EGL_MESA_screen_surface
 721    drv->API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
 722    drv->API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
 723 #endif
 724 }