src/egl/main/eglapi.c

   1 /**
   2  * Public EGL API entrypoints
   3  *
   4  * Generally, we use the EGLDisplay parameter as a key to lookup the
   5  * appropriate device driver handle, then jump though the driver's
   6  * dispatch table to handle the function.
   7  *
   8  * That allows us the option of supporting multiple, simultaneous,
   9  * heterogeneous hardware devices in the future.
  10  *
  11  * The EGLDisplay, EGLConfig, EGLContext and EGLSurface types are
  12  * opaque handles. Internal objects are linked to a display to
  13  * create the handles.
  14  *
  15  * For each public API entry point, the opaque handles are looked up
  16  * before being dispatched to the drivers.  When it fails to look up
  17  * a handle, one of
  18  *
  19  * EGL_BAD_DISPLAY
  20  * EGL_BAD_CONFIG
  21  * EGL_BAD_CONTEXT
  22  * EGL_BAD_SURFACE
  23  * EGL_BAD_SCREEN_MESA
  24  * EGL_BAD_MODE_MESA
  25  *
  26  * is generated and the driver function is not called. An
  27  * uninitialized EGLDisplay has no driver associated with it. When
  28  * such display is detected,
  29  *
  30  * EGL_NOT_INITIALIZED
  31  *
  32  * is generated.
  33  *
  34  * Some of the entry points use current display, context, or surface
  35  * implicitly.  For such entry points, the implicit objects are also
  36  * checked before calling the driver function.  Other than the
  37  * errors listed above,
  38  *
  39  * EGL_BAD_CURRENT_SURFACE
  40  *
  41  * may also be generated.
  42  *
  43  * Notes on naming conventions:
  44  *
  45  * eglFooBar    - public EGL function
  46  * EGL_FOO_BAR  - public EGL token
  47  * EGLDatatype  - public EGL datatype
  48  *
  49  * _eglFooBar   - private EGL function
  50  * _EGLDatatype - private EGL datatype, typedef'd struct
  51  * _egl_struct  - private EGL struct, non-typedef'd
  52  *
  53  */
  54
  55
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include "eglcontext.h"
  60 #include "egldisplay.h"
  61 #include "egltypedefs.h"
  62 #include "eglglobals.h"
  63 #include "egldriver.h"
  64 #include "eglsurface.h"
  65 #include "eglconfig.h"
  66 #include "eglscreen.h"
  67 #include "eglmode.h"
  68
  69
  70 /**
  71  * This is typically the first EGL function that an application calls.
  72  * We initialize our global vars and create a private _EGLDisplay object.
  73  */
  74 EGLDisplay EGLAPIENTRY
  75 eglGetDisplay(NativeDisplayType nativeDisplay)
  76 {
  77    _EGLDisplay *dpy;
  78    dpy = _eglFindDisplay(nativeDisplay);
  79    if (!dpy) {
  80       dpy = _eglNewDisplay(nativeDisplay);
  81       if (dpy)
  82          _eglLinkDisplay(dpy);
  83    }
  84    return _eglGetDisplayHandle(dpy);
  85 }
  86
  87
  88 /**
  89  * This is typically the second EGL function that an application calls.
  90  * Here we load/initialize the actual hardware driver.
  91  */
  92 EGLBoolean EGLAPIENTRY
  93 eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
  94 {
  95    _EGLDisplay *disp = _eglLookupDisplay(dpy);
  96    _EGLDriver *drv;
  97    EGLint major_int, minor_int;
  98
  99    if (!disp)
 100       return _eglError(EGL_BAD_DISPLAY, __FUNCTION__);
 101
 102    drv = disp->Driver;
 103    if (!drv) {
 104       drv = _eglOpenDriver(disp);
 105       if (!drv)
 106          return _eglError(EGL_NOT_INITIALIZED, __FUNCTION__);
 107
 108       /* Initialize the particular display now */
 109       if (!drv->API.Initialize(drv, disp, &major_int, &minor_int)) {
 110          _eglCloseDriver(drv, disp);
 111          return _eglError(EGL_NOT_INITIALIZED, __FUNCTION__);
 112       }
 113
 114       disp->APImajor = major_int;
 115       disp->APIminor = minor_int;
 116       snprintf(disp->Version, sizeof(disp->Version),
 117                "%d.%d (%s)", major_int, minor_int, drv->Name);
 118
 119       /* limit to APIs supported by core */
 120       disp->ClientAPIsMask &= _EGL_API_ALL_BITS;
 121
 122       disp->Driver = drv;
 123    } else {
 124       major_int = disp->APImajor;
 125       minor_int = disp->APIminor;
 126    }
 127
 128    /* Update applications version of major and minor if not NULL */
 129    if ((major != NULL) && (minor != NULL)) {
 130       *major = major_int;
 131       *minor = minor_int;
 132    }
 133
 134    return EGL_TRUE;
 135 }
 136
 137
 138 EGLBoolean EGLAPIENTRY
 139 eglTerminate(EGLDisplay dpy)
 140 {
 141    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 142    _EGLDriver *drv;
 143
 144    if (!disp)
 145       return _eglError(EGL_BAD_DISPLAY, __FUNCTION__);
 146
 147    drv = disp->Driver;
 148    if (drv) {
 149       drv->API.Terminate(drv, disp);
 150       _eglCloseDriver(drv, disp);
 151       disp->Driver = NULL;
 152    }
 153
 154    return EGL_TRUE;
 155 }
 156
 157
 158 /**
 159  * A bunch of check functions and declare macros to simply error checking.
 160  */
 161 static INLINE _EGLDriver *
 162 _eglCheckDisplay(_EGLDisplay *disp, const char *msg)
 163 {
 164    if (!disp) {
 165       _eglError(EGL_BAD_DISPLAY, msg);
 166       return NULL;
 167    }
 168    if (!disp->Driver) {
 169       _eglError(EGL_NOT_INITIALIZED, msg);
 170       return NULL;
 171    }
 172    return disp->Driver;
 173 }
 174
 175
 176 static INLINE _EGLDriver *
 177 _eglCheckSurface(_EGLDisplay *disp, _EGLSurface *surf, const char *msg)
 178 {
 179    _EGLDriver *drv = _eglCheckDisplay(disp, msg);
 180    if (!drv)
 181       return NULL;
 182    if (!surf) {
 183       _eglError(EGL_BAD_SURFACE, msg);
 184       return NULL;
 185    }
 186    return drv;
 187 }
 188
 189
 190 static INLINE _EGLDriver *
 191 _eglCheckContext(_EGLDisplay *disp, _EGLContext *context, const char *msg)
 192 {
 193    _EGLDriver *drv = _eglCheckDisplay(disp, msg);
 194    if (!drv)
 195       return NULL;
 196    if (!context) {
 197       _eglError(EGL_BAD_CONTEXT, msg);
 198       return NULL;
 199    }
 200    return drv;
 201 }
 202
 203
 204 static INLINE _EGLDriver *
 205 _eglCheckConfig(_EGLDisplay *disp, _EGLConfig *conf, const char *msg)
 206 {
 207    _EGLDriver *drv = _eglCheckDisplay(disp, msg);
 208    if (!drv)
 209       return NULL;
 210    if (!conf) {
 211       _eglError(EGL_BAD_CONFIG, msg);
 212       return NULL;
 213    }
 214    return drv;
 215 }
 216
 217
 218 #define _EGL_DECLARE_DD(dpy)                                   \
 219    _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
 220    _EGLDriver *drv;                                            \
 221    do {                                                        \
 222       drv = _eglCheckDisplay(disp, __FUNCTION__);              \
 223       if (!drv)                                                \
 224          return EGL_FALSE;                                     \
 225    } while (0)
 226
 227
 228 #define _EGL_DECLARE_DD_AND_SURFACE(dpy, surface)              \
 229    _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
 230    _EGLSurface *surf = _eglLookupSurface((surface), disp);     \
 231    _EGLDriver *drv;                                            \
 232    do {                                                        \
 233       drv = _eglCheckSurface(disp, surf, __FUNCTION__);        \
 234       if (!drv)                                                \
 235          return EGL_FALSE;                                     \
 236    } while (0)
 237
 238
 239 #define _EGL_DECLARE_DD_AND_CONTEXT(dpy, ctx)                  \
 240    _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
 241    _EGLContext *context = _eglLookupContext((ctx), disp);      \
 242    _EGLDriver *drv;                                            \
 243    do {                                                        \
 244       drv = _eglCheckContext(disp, context, __FUNCTION__);     \
 245       if (!drv)                                                \
 246          return EGL_FALSE;                                     \
 247    } while (0)
 248
 249
 250 #ifdef EGL_MESA_screen_surface
 251
 252
 253 static INLINE _EGLDriver *
 254 _eglCheckScreen(_EGLDisplay *disp, _EGLScreen *scrn, const char *msg)
 255 {
 256    _EGLDriver *drv = _eglCheckDisplay(disp, msg);
 257    if (!drv)
 258       return NULL;
 259    if (!scrn) {
 260       _eglError(EGL_BAD_SCREEN_MESA, msg);
 261       return NULL;
 262    }
 263    return drv;
 264 }
 265
 266
 267 static INLINE _EGLDriver *
 268 _eglCheckMode(_EGLDisplay *disp, _EGLMode *m, const char *msg)
 269 {
 270    _EGLDriver *drv = _eglCheckDisplay(disp, msg);
 271    if (!drv)
 272       return NULL;
 273    if (!m) {
 274       _eglError(EGL_BAD_MODE_MESA, msg);
 275       return NULL;
 276    }
 277    return drv;
 278 }
 279
 280
 281 #define _EGL_DECLARE_DD_AND_SCREEN(dpy, screen)                \
 282    _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
 283    _EGLScreen *scrn = _eglLookupScreen((screen), disp);        \
 284    _EGLDriver *drv;                                            \
 285    do {                                                        \
 286       drv = _eglCheckScreen(disp, scrn, __FUNCTION__);         \
 287       if (!drv)                                                \
 288          return EGL_FALSE;                                     \
 289    } while (0)
 290
 291
 292 #define _EGL_DECLARE_DD_AND_MODE(dpy, mode)                    \
 293    _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
 294    _EGLMode *m = _eglLookupMode((mode), disp);                 \
 295    _EGLDriver *drv;                                            \
 296    do {                                                        \
 297       drv = _eglCheckMode(disp, m, __FUNCTION__);              \
 298       if (!drv)                                                \
 299          return EGL_FALSE;                                     \
 300    } while (0)
 301
 302
 303 #endif /* EGL_MESA_screen_surface */
 304
 305
 306 const char * EGLAPIENTRY
 307 eglQueryString(EGLDisplay dpy, EGLint name)
 308 {
 309    _EGL_DECLARE_DD(dpy);
 310    return drv->API.QueryString(drv, disp, name);
 311 }
 312
 313
 314 EGLBoolean EGLAPIENTRY
 315 eglGetConfigs(EGLDisplay dpy, EGLConfig *configs,
 316               EGLint config_size, EGLint *num_config)
 317 {
 318    _EGL_DECLARE_DD(dpy);
 319    return drv->API.GetConfigs(drv, disp, configs, config_size, num_config);
 320 }
 321
 322
 323 EGLBoolean EGLAPIENTRY
 324 eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs,
 325                 EGLint config_size, EGLint *num_config)
 326 {
 327    _EGL_DECLARE_DD(dpy);
 328    return drv->API.ChooseConfig(drv, disp, attrib_list, configs,
 329                                 config_size, num_config);
 330 }
 331
 332
 333 EGLBoolean EGLAPIENTRY
 334 eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config,
 335                    EGLint attribute, EGLint *value)
 336 {
 337    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 338    _EGLConfig *conf = _eglLookupConfig(config, disp);
 339    _EGLDriver *drv;
 340
 341    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 342    if (!drv)
 343       return EGL_FALSE;
 344
 345    return drv->API.GetConfigAttrib(drv, disp, conf, attribute, value);
 346 }
 347
 348
 349 EGLContext EGLAPIENTRY
 350 eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_list,
 351                  const EGLint *attrib_list)
 352 {
 353    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 354    _EGLConfig *conf = _eglLookupConfig(config, disp);
 355    _EGLContext *share = _eglLookupContext(share_list, disp);
 356    _EGLDriver *drv;
 357    _EGLContext *context;
 358
 359    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 360    if (!drv)
 361       return EGL_NO_CONTEXT;
 362    if (!share && share_list != EGL_NO_CONTEXT) {
 363       _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
 364       return EGL_NO_CONTEXT;
 365    }
 366
 367    context = drv->API.CreateContext(drv, disp, conf, share, attrib_list);
 368    if (context)
 369       return _eglLinkContext(context, disp);
 370    else
 371       return EGL_NO_CONTEXT;
 372 }
 373
 374
 375 EGLBoolean EGLAPIENTRY
 376 eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
 377 {
 378    _EGL_DECLARE_DD_AND_CONTEXT(dpy, ctx);
 379    _eglUnlinkContext(context);
 380    return drv->API.DestroyContext(drv, disp, context);
 381 }
 382
 383
 384 EGLBoolean EGLAPIENTRY
 385 eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read,
 386                EGLContext ctx)
 387 {
 388    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 389    _EGLContext *context = _eglLookupContext(ctx, disp);
 390    _EGLSurface *draw_surf = _eglLookupSurface(draw, disp);
 391    _EGLSurface *read_surf = _eglLookupSurface(read, disp);
 392    _EGLDriver *drv;
 393
 394    drv = _eglCheckDisplay(disp, __FUNCTION__);
 395    if (!drv)
 396       return EGL_FALSE;
 397    if (!context && ctx != EGL_NO_CONTEXT)
 398       return _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
 399    if ((!draw_surf && draw != EGL_NO_SURFACE) ||
 400        (!read_surf && read != EGL_NO_SURFACE))
 401       return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
 402
 403    return drv->API.MakeCurrent(drv, disp, draw_surf, read_surf, context);
 404 }
 405
 406
 407 EGLBoolean EGLAPIENTRY
 408 eglQueryContext(EGLDisplay dpy, EGLContext ctx,
 409                 EGLint attribute, EGLint *value)
 410 {
 411    _EGL_DECLARE_DD_AND_CONTEXT(dpy, ctx);
 412    return drv->API.QueryContext(drv, disp, context, attribute, value);
 413 }
 414
 415
 416 EGLSurface EGLAPIENTRY
 417 eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config,
 418                        NativeWindowType window, const EGLint *attrib_list)
 419 {
 420    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 421    _EGLConfig *conf = _eglLookupConfig(config, disp);
 422    _EGLDriver *drv;
 423    _EGLSurface *surf;
 424
 425    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 426    if (!drv)
 427       return EGL_NO_SURFACE;
 428
 429    surf = drv->API.CreateWindowSurface(drv, disp, conf, window, attrib_list);
 430    if (surf)
 431       return _eglLinkSurface(surf, disp);
 432    else
 433       return EGL_NO_SURFACE;
 434 }
 435
 436
 437 EGLSurface EGLAPIENTRY
 438 eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config,
 439                        NativePixmapType pixmap, const EGLint *attrib_list)
 440 {
 441    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 442    _EGLConfig *conf = _eglLookupConfig(config, disp);
 443    _EGLDriver *drv;
 444    _EGLSurface *surf;
 445
 446    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 447    if (!drv)
 448       return EGL_NO_SURFACE;
 449
 450    surf = drv->API.CreatePixmapSurface(drv, disp, conf, pixmap, attrib_list);
 451    if (surf)
 452       return _eglLinkSurface(surf, disp);
 453    else
 454       return EGL_NO_SURFACE;
 455 }
 456
 457
 458 EGLSurface EGLAPIENTRY
 459 eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config,
 460                         const EGLint *attrib_list)
 461 {
 462    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 463    _EGLConfig *conf = _eglLookupConfig(config, disp);
 464    _EGLDriver *drv;
 465    _EGLSurface *surf;
 466
 467    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 468    if (!drv)
 469       return EGL_NO_SURFACE;
 470
 471    surf = drv->API.CreatePbufferSurface(drv, disp, conf, attrib_list);
 472    if (surf)
 473       return _eglLinkSurface(surf, disp);
 474    else
 475       return EGL_NO_SURFACE;
 476 }
 477
 478
 479 EGLBoolean EGLAPIENTRY
 480 eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
 481 {
 482    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 483    _eglUnlinkSurface(surf);
 484    return drv->API.DestroySurface(drv, disp, surf);
 485 }
 486
 487 EGLBoolean EGLAPIENTRY
 488 eglQuerySurface(EGLDisplay dpy, EGLSurface surface,
 489                 EGLint attribute, EGLint *value)
 490 {
 491    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 492    return drv->API.QuerySurface(drv, disp, surf, attribute, value);
 493 }
 494
 495 EGLBoolean EGLAPIENTRY
 496 eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface,
 497                  EGLint attribute, EGLint value)
 498 {
 499    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 500    return drv->API.SurfaceAttrib(drv, disp, surf, attribute, value);
 501 }
 502
 503
 504 EGLBoolean EGLAPIENTRY
 505 eglBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
 506 {
 507    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 508    return drv->API.BindTexImage(drv, disp, surf, buffer);
 509 }
 510
 511
 512 EGLBoolean EGLAPIENTRY
 513 eglReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
 514 {
 515    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 516    return drv->API.ReleaseTexImage(drv, disp, surf, buffer);
 517 }
 518
 519
 520 EGLBoolean EGLAPIENTRY
 521 eglSwapInterval(EGLDisplay dpy, EGLint interval)
 522 {
 523    _EGLContext *ctx = _eglGetCurrentContext();
 524    _EGLSurface *surf;
 525    _EGL_DECLARE_DD(dpy);
 526
 527    if (!ctx || !_eglIsContextLinked(ctx) || ctx->Display != disp)
 528       return _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
 529
 530    surf = ctx->DrawSurface;
 531    if (!_eglIsSurfaceLinked(surf))
 532       return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
 533
 534    return drv->API.SwapInterval(drv, disp, surf, interval);
 535 }
 536
 537
 538 EGLBoolean EGLAPIENTRY
 539 eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
 540 {
 541    _EGLContext *ctx = _eglGetCurrentContext();
 542    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 543
 544    /* surface must be bound to current context in EGL 1.4 */
 545    if (!ctx || !_eglIsContextLinked(ctx) || surf != ctx->DrawSurface)
 546       return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
 547
 548    return drv->API.SwapBuffers(drv, disp, surf);
 549 }
 550
 551
 552 EGLBoolean EGLAPIENTRY
 553 eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, NativePixmapType target)
 554 {
 555    _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
 556    return drv->API.CopyBuffers(drv, disp, surf, target);
 557 }
 558
 559
 560 EGLBoolean EGLAPIENTRY
 561 eglWaitClient(void)
 562 {
 563    _EGLContext *ctx = _eglGetCurrentContext();
 564    _EGLDisplay *disp;
 565    _EGLDriver *drv;
 566
 567    if (!ctx)
 568       return EGL_TRUE;
 569    /* let bad current context imply bad current surface */
 570    if (!_eglIsContextLinked(ctx) || !_eglIsSurfaceLinked(ctx->DrawSurface))
 571       return _eglError(EGL_BAD_CURRENT_SURFACE, __FUNCTION__);
 572
 573    /* a valid current context implies an initialized current display */
 574    disp = ctx->Display;
 575    drv = disp->Driver;
 576    assert(drv);
 577
 578    return drv->API.WaitClient(drv, disp, ctx);
 579 }
 580
 581
 582 EGLBoolean EGLAPIENTRY
 583 eglWaitGL(void)
 584 {
 585 #ifdef EGL_VERSION_1_2
 586    _EGLThreadInfo *t = _eglGetCurrentThread();
 587    EGLint api_index = t->CurrentAPIIndex;
 588    EGLint es_index = _eglConvertApiToIndex(EGL_OPENGL_ES_API);
 589    EGLBoolean ret;
 590
 591    if (api_index != es_index && _eglIsCurrentThreadDummy())
 592       return _eglError(EGL_BAD_ALLOC, "eglWaitGL");
 593
 594    t->CurrentAPIIndex = es_index;
 595    ret = eglWaitClient();
 596    t->CurrentAPIIndex = api_index;
 597    return ret;
 598 #else
 599    return eglWaitClient();
 600 #endif
 601 }
 602
 603
 604 EGLBoolean EGLAPIENTRY
 605 eglWaitNative(EGLint engine)
 606 {
 607    _EGLContext *ctx = _eglGetCurrentContext();
 608    _EGLDisplay *disp;
 609    _EGLDriver *drv;
 610
 611    if (!ctx)
 612       return EGL_TRUE;
 613    /* let bad current context imply bad current surface */
 614    if (!_eglIsContextLinked(ctx) || !_eglIsSurfaceLinked(ctx->DrawSurface))
 615       return _eglError(EGL_BAD_CURRENT_SURFACE, __FUNCTION__);
 616
 617    /* a valid current context implies an initialized current display */
 618    disp = ctx->Display;
 619    drv = disp->Driver;
 620    assert(drv);
 621
 622    return drv->API.WaitNative(drv, disp, engine);
 623 }
 624
 625
 626 EGLDisplay EGLAPIENTRY
 627 eglGetCurrentDisplay(void)
 628 {
 629    _EGLDisplay *dpy = _eglGetCurrentDisplay();
 630    return _eglGetDisplayHandle(dpy);
 631 }
 632
 633
 634 EGLContext EGLAPIENTRY
 635 eglGetCurrentContext(void)
 636 {
 637    _EGLContext *ctx = _eglGetCurrentContext();
 638    return _eglGetContextHandle(ctx);
 639 }
 640
 641
 642 EGLSurface EGLAPIENTRY
 643 eglGetCurrentSurface(EGLint readdraw)
 644 {
 645    _EGLContext *ctx = _eglGetCurrentContext();
 646    _EGLSurface *surf;
 647
 648    if (!ctx)
 649       return EGL_NO_SURFACE;
 650
 651    switch (readdraw) {
 652    case EGL_DRAW:
 653       surf = ctx->DrawSurface;
 654       break;
 655    case EGL_READ:
 656       surf = ctx->ReadSurface;
 657       break;
 658    default:
 659       _eglError(EGL_BAD_PARAMETER, __FUNCTION__);
 660       surf = NULL;
 661       break;
 662    }
 663
 664    return _eglGetSurfaceHandle(surf);
 665 }
 666
 667
 668 EGLint EGLAPIENTRY
 669 eglGetError(void)
 670 {
 671    _EGLThreadInfo *t = _eglGetCurrentThread();
 672    EGLint e = t->LastError;
 673    if (!_eglIsCurrentThreadDummy())
 674       t->LastError = EGL_SUCCESS;
 675    return e;
 676 }
 677
 678
 679 void (* EGLAPIENTRY eglGetProcAddress(const char *procname))()
 680 {
 681    static const struct {
 682       const char *name;
 683       _EGLProc function;
 684    } egl_functions[] = {
 685       /* extensions only */
 686 #ifdef EGL_MESA_screen_surface
 687       { "eglChooseModeMESA", (_EGLProc) eglChooseModeMESA },
 688       { "eglGetModesMESA", (_EGLProc) eglGetModesMESA },
 689       { "eglGetModeAttribMESA", (_EGLProc) eglGetModeAttribMESA },
 690       { "eglCopyContextMESA", (_EGLProc) eglCopyContextMESA },
 691       { "eglGetScreensMESA", (_EGLProc) eglGetScreensMESA },
 692       { "eglCreateScreenSurfaceMESA", (_EGLProc) eglCreateScreenSurfaceMESA },
 693       { "eglShowScreenSurfaceMESA", (_EGLProc) eglShowScreenSurfaceMESA },
 694       { "eglScreenPositionMESA", (_EGLProc) eglScreenPositionMESA },
 695       { "eglQueryScreenMESA", (_EGLProc) eglQueryScreenMESA },
 696       { "eglQueryScreenSurfaceMESA", (_EGLProc) eglQueryScreenSurfaceMESA },
 697       { "eglQueryScreenModeMESA", (_EGLProc) eglQueryScreenModeMESA },
 698       { "eglQueryModeStringMESA", (_EGLProc) eglQueryModeStringMESA },
 699 #endif /* EGL_MESA_screen_surface */
 700       { NULL, NULL }
 701    };
 702    EGLint i;
 703
 704    if (!procname)
 705       return NULL;
 706    if (strncmp(procname, "egl", 3) == 0) {
 707       for (i = 0; egl_functions[i].name; i++) {
 708          if (strcmp(egl_functions[i].name, procname) == 0)
 709             return egl_functions[i].function;
 710       }
 711    }
 712
 713    /* preload a driver if there isn't one */
 714    if (!_eglGlobal.NumDrivers)
 715       _eglPreloadDriver(NULL);
 716
 717    /* now loop over drivers to query their procs */
 718    for (i = 0; i < _eglGlobal.NumDrivers; i++) {
 719       _EGLProc p = _eglGlobal.Drivers[i]->API.GetProcAddress(procname);
 720       if (p)
 721          return p;
 722    }
 723
 724    return NULL;
 725 }
 726
 727
 728 #ifdef EGL_MESA_screen_surface
 729
 730
 731 /*
 732  * EGL_MESA_screen extension
 733  */
 734
 735 EGLBoolean EGLAPIENTRY
 736 eglChooseModeMESA(EGLDisplay dpy, EGLScreenMESA screen,
 737                   const EGLint *attrib_list, EGLModeMESA *modes,
 738                   EGLint modes_size, EGLint *num_modes)
 739 {
 740    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 741    return drv->API.ChooseModeMESA(drv, disp, scrn, attrib_list,
 742                                   modes, modes_size, num_modes);
 743 }
 744
 745
 746 EGLBoolean EGLAPIENTRY
 747 eglGetModesMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *modes,
 748                 EGLint mode_size, EGLint *num_mode)
 749 {
 750    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 751    return drv->API.GetModesMESA(drv, disp, scrn, modes, mode_size, num_mode);
 752 }
 753
 754
 755 EGLBoolean EGLAPIENTRY
 756 eglGetModeAttribMESA(EGLDisplay dpy, EGLModeMESA mode,
 757                      EGLint attribute, EGLint *value)
 758 {
 759    _EGL_DECLARE_DD_AND_MODE(dpy, mode);
 760    return drv->API.GetModeAttribMESA(drv, disp, m, attribute, value);
 761 }
 762
 763
 764 EGLBoolean EGLAPIENTRY
 765 eglCopyContextMESA(EGLDisplay dpy, EGLContext source, EGLContext dest,
 766                    EGLint mask)
 767 {
 768    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 769    _EGLContext *source_context = _eglLookupContext(source, disp);
 770    _EGLContext *dest_context = _eglLookupContext(dest, disp);
 771    _EGLDriver *drv;
 772
 773    drv = _eglCheckContext(disp, source_context, __FUNCTION__);
 774    if (!drv || !dest_context) {
 775       if (drv)
 776          _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
 777       return EGL_FALSE;
 778    }
 779
 780    return drv->API.CopyContextMESA(drv, disp, source_context, dest_context,
 781                                    mask);
 782 }
 783
 784
 785 EGLBoolean
 786 eglGetScreensMESA(EGLDisplay dpy, EGLScreenMESA *screens,
 787                   EGLint max_screens, EGLint *num_screens)
 788 {
 789    _EGL_DECLARE_DD(dpy);
 790    return drv->API.GetScreensMESA(drv, disp, screens,
 791                                   max_screens, num_screens);
 792 }
 793
 794
 795 EGLSurface
 796 eglCreateScreenSurfaceMESA(EGLDisplay dpy, EGLConfig config,
 797                            const EGLint *attrib_list)
 798 {
 799    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 800    _EGLConfig *conf = _eglLookupConfig(config, disp);
 801    _EGLDriver *drv;
 802    _EGLSurface *surf;
 803
 804    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 805    if (!drv)
 806       return EGL_NO_SURFACE;
 807
 808    surf = drv->API.CreateScreenSurfaceMESA(drv, disp, conf, attrib_list);
 809    if (surf)
 810       return _eglLinkSurface(surf, disp);
 811    else
 812       return EGL_NO_SURFACE;
 813 }
 814
 815
 816 EGLBoolean
 817 eglShowScreenSurfaceMESA(EGLDisplay dpy, EGLint screen,
 818                          EGLSurface surface, EGLModeMESA mode)
 819 {
 820    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 821    _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
 822    _EGLSurface *surf = _eglLookupSurface(surface, disp);
 823    _EGLMode *m = _eglLookupMode(mode, disp);
 824    _EGLDriver *drv;
 825
 826    drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
 827    if (!drv)
 828       return EGL_FALSE;
 829    if (!surf && surface != EGL_NO_SURFACE)
 830       return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
 831    if (!m && mode != EGL_NO_MODE_MESA)
 832       return _eglError(EGL_BAD_MODE_MESA, __FUNCTION__);
 833
 834    return drv->API.ShowScreenSurfaceMESA(drv, disp, scrn, surf, m);
 835 }
 836
 837
 838 EGLBoolean
 839 eglScreenPositionMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLint x, EGLint y)
 840 {
 841    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 842    return drv->API.ScreenPositionMESA(drv, disp, scrn, x, y);
 843 }
 844
 845
 846 EGLBoolean
 847 eglQueryScreenMESA(EGLDisplay dpy, EGLScreenMESA screen,
 848                    EGLint attribute, EGLint *value)
 849 {
 850    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 851    return drv->API.QueryScreenMESA(drv, disp, scrn, attribute, value);
 852 }
 853
 854
 855 EGLBoolean
 856 eglQueryScreenSurfaceMESA(EGLDisplay dpy, EGLScreenMESA screen,
 857                           EGLSurface *surface)
 858 {
 859    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 860    _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
 861    _EGLDriver *drv;
 862    _EGLSurface *surf;
 863
 864    drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
 865    if (!drv)
 866       return EGL_FALSE;
 867
 868    if (drv->API.QueryScreenSurfaceMESA(drv, disp, scrn, &surf) != EGL_TRUE)
 869       surf = NULL;
 870    if (surface)
 871       *surface = _eglGetSurfaceHandle(surf);
 872    return (surf != NULL);
 873 }
 874
 875
 876 EGLBoolean
 877 eglQueryScreenModeMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *mode)
 878 {
 879    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 880    _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
 881    _EGLDriver *drv;
 882    _EGLMode *m;
 883
 884    drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
 885    if (!drv)
 886       return EGL_FALSE;
 887
 888    if (drv->API.QueryScreenModeMESA(drv, disp, scrn, &m) != EGL_TRUE)
 889       m = NULL;
 890    if (mode)
 891       *mode = m->Handle;
 892
 893    return (m != NULL);
 894 }
 895
 896
 897 const char *
 898 eglQueryModeStringMESA(EGLDisplay dpy, EGLModeMESA mode)
 899 {
 900    _EGL_DECLARE_DD_AND_MODE(dpy, mode);
 901    return drv->API.QueryModeStringMESA(drv, disp, m);
 902 }
 903
 904
 905 #endif /* EGL_MESA_screen_surface */
 906
 907
 908 /**
 909  ** EGL 1.2
 910  **/
 911
 912 #ifdef EGL_VERSION_1_2
 913
 914
 915 /**
 916  * Specify the client API to use for subsequent calls including:
 917  *  eglCreateContext()
 918  *  eglGetCurrentContext()
 919  *  eglGetCurrentDisplay()
 920  *  eglGetCurrentSurface()
 921  *  eglMakeCurrent(when the ctx parameter is EGL NO CONTEXT)
 922  *  eglWaitClient()
 923  *  eglWaitNative()
 924  * See section 3.7 "Rendering Context" in the EGL specification for details.
 925  */
 926 EGLBoolean
 927 eglBindAPI(EGLenum api)
 928 {
 929    _EGLThreadInfo *t = _eglGetCurrentThread();
 930
 931    if (_eglIsCurrentThreadDummy())
 932       return _eglError(EGL_BAD_ALLOC, "eglBindAPI");
 933
 934    if (!_eglIsApiValid(api))
 935       return _eglError(EGL_BAD_PARAMETER, "eglBindAPI");
 936
 937    t->CurrentAPIIndex = _eglConvertApiToIndex(api);
 938    return EGL_TRUE;
 939 }
 940
 941
 942 /**
 943  * Return the last value set with eglBindAPI().
 944  */
 945 EGLenum
 946 eglQueryAPI(void)
 947 {
 948    /* returns one of EGL_OPENGL_API, EGL_OPENGL_ES_API or EGL_OPENVG_API */
 949    _EGLThreadInfo *t = _eglGetCurrentThread();
 950    return _eglConvertApiFromIndex(t->CurrentAPIIndex);
 951 }
 952
 953
 954 EGLSurface
 955 eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype,
 956                                  EGLClientBuffer buffer, EGLConfig config,
 957                                  const EGLint *attrib_list)
 958 {
 959    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 960    _EGLConfig *conf = _eglLookupConfig(config, disp);
 961    _EGLDriver *drv;
 962    _EGLSurface *surf;
 963
 964    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 965    if (!drv)
 966       return EGL_NO_SURFACE;
 967
 968    surf = drv->API.CreatePbufferFromClientBuffer(drv, disp, buftype, buffer,
 969                                                  conf, attrib_list);
 970    if (surf)
 971       return _eglLinkSurface(surf, disp);
 972    else
 973       return EGL_NO_SURFACE;
 974 }
 975
 976
 977 EGLBoolean
 978 eglReleaseThread(void)
 979 {
 980    /* unbind current context */
 981    if (!_eglIsCurrentThreadDummy()) {
 982       _EGLDisplay *disp = _eglGetCurrentDisplay();
 983       _EGLDriver *drv;
 984       if (disp) {
 985          drv = disp->Driver;
 986          (void) drv->API.MakeCurrent(drv, disp, NULL, NULL, NULL);
 987       }
 988    }
 989
 990    _eglDestroyCurrentThread();
 991    return EGL_TRUE;
 992 }
 993
 994
 995 #endif /* EGL_VERSION_1_2 */