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 eglWaitGL(void)
 562 {
 563    _EGLDisplay *disp = _eglGetCurrentDisplay();
 564    _EGLDriver *drv;
 565
 566    if (!disp)
 567       return EGL_TRUE;
 568
 569    /* a current display is always initialized */
 570    drv = disp->Driver;
 571
 572    return drv->API.WaitGL(drv, disp);
 573 }
 574
 575
 576 EGLBoolean EGLAPIENTRY
 577 eglWaitNative(EGLint engine)
 578 {
 579    _EGLDisplay *disp = _eglGetCurrentDisplay();
 580    _EGLDriver *drv;
 581
 582    if (!disp)
 583       return EGL_TRUE;
 584
 585    /* a current display is always initialized */
 586    drv = disp->Driver;
 587
 588    return drv->API.WaitNative(drv, disp, engine);
 589 }
 590
 591
 592 EGLDisplay EGLAPIENTRY
 593 eglGetCurrentDisplay(void)
 594 {
 595    _EGLDisplay *dpy = _eglGetCurrentDisplay();
 596    return _eglGetDisplayHandle(dpy);
 597 }
 598
 599
 600 EGLContext EGLAPIENTRY
 601 eglGetCurrentContext(void)
 602 {
 603    _EGLContext *ctx = _eglGetCurrentContext();
 604    return _eglGetContextHandle(ctx);
 605 }
 606
 607
 608 EGLSurface EGLAPIENTRY
 609 eglGetCurrentSurface(EGLint readdraw)
 610 {
 611    _EGLContext *ctx = _eglGetCurrentContext();
 612    _EGLSurface *surf;
 613
 614    if (!ctx)
 615       return EGL_NO_SURFACE;
 616
 617    switch (readdraw) {
 618    case EGL_DRAW:
 619       surf = ctx->DrawSurface;
 620       break;
 621    case EGL_READ:
 622       surf = ctx->ReadSurface;
 623       break;
 624    default:
 625       _eglError(EGL_BAD_PARAMETER, __FUNCTION__);
 626       surf = NULL;
 627       break;
 628    }
 629
 630    return _eglGetSurfaceHandle(surf);
 631 }
 632
 633
 634 EGLint EGLAPIENTRY
 635 eglGetError(void)
 636 {
 637    _EGLThreadInfo *t = _eglGetCurrentThread();
 638    EGLint e = t->LastError;
 639    if (!_eglIsCurrentThreadDummy())
 640       t->LastError = EGL_SUCCESS;
 641    return e;
 642 }
 643
 644
 645 void (* EGLAPIENTRY eglGetProcAddress(const char *procname))()
 646 {
 647    static const struct {
 648       const char *name;
 649       _EGLProc function;
 650    } egl_functions[] = {
 651       /* extensions only */
 652 #ifdef EGL_MESA_screen_surface
 653       { "eglChooseModeMESA", (_EGLProc) eglChooseModeMESA },
 654       { "eglGetModesMESA", (_EGLProc) eglGetModesMESA },
 655       { "eglGetModeAttribMESA", (_EGLProc) eglGetModeAttribMESA },
 656       { "eglCopyContextMESA", (_EGLProc) eglCopyContextMESA },
 657       { "eglGetScreensMESA", (_EGLProc) eglGetScreensMESA },
 658       { "eglCreateScreenSurfaceMESA", (_EGLProc) eglCreateScreenSurfaceMESA },
 659       { "eglShowScreenSurfaceMESA", (_EGLProc) eglShowScreenSurfaceMESA },
 660       { "eglScreenPositionMESA", (_EGLProc) eglScreenPositionMESA },
 661       { "eglQueryScreenMESA", (_EGLProc) eglQueryScreenMESA },
 662       { "eglQueryScreenSurfaceMESA", (_EGLProc) eglQueryScreenSurfaceMESA },
 663       { "eglQueryScreenModeMESA", (_EGLProc) eglQueryScreenModeMESA },
 664       { "eglQueryModeStringMESA", (_EGLProc) eglQueryModeStringMESA },
 665 #endif /* EGL_MESA_screen_surface */
 666       { NULL, NULL }
 667    };
 668    EGLint i;
 669
 670    if (!procname)
 671       return NULL;
 672    if (strncmp(procname, "egl", 3) == 0) {
 673       for (i = 0; egl_functions[i].name; i++) {
 674          if (strcmp(egl_functions[i].name, procname) == 0)
 675             return egl_functions[i].function;
 676       }
 677    }
 678
 679    /* preload a driver if there isn't one */
 680    if (!_eglGlobal.NumDrivers)
 681       _eglPreloadDriver(NULL);
 682
 683    /* now loop over drivers to query their procs */
 684    for (i = 0; i < _eglGlobal.NumDrivers; i++) {
 685       _EGLProc p = _eglGlobal.Drivers[i]->API.GetProcAddress(procname);
 686       if (p)
 687          return p;
 688    }
 689
 690    return NULL;
 691 }
 692
 693
 694 #ifdef EGL_MESA_screen_surface
 695
 696
 697 /*
 698  * EGL_MESA_screen extension
 699  */
 700
 701 EGLBoolean EGLAPIENTRY
 702 eglChooseModeMESA(EGLDisplay dpy, EGLScreenMESA screen,
 703                   const EGLint *attrib_list, EGLModeMESA *modes,
 704                   EGLint modes_size, EGLint *num_modes)
 705 {
 706    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 707    return drv->API.ChooseModeMESA(drv, disp, scrn, attrib_list,
 708                                   modes, modes_size, num_modes);
 709 }
 710
 711
 712 EGLBoolean EGLAPIENTRY
 713 eglGetModesMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *modes,
 714                 EGLint mode_size, EGLint *num_mode)
 715 {
 716    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 717    return drv->API.GetModesMESA(drv, disp, scrn, modes, mode_size, num_mode);
 718 }
 719
 720
 721 EGLBoolean EGLAPIENTRY
 722 eglGetModeAttribMESA(EGLDisplay dpy, EGLModeMESA mode,
 723                      EGLint attribute, EGLint *value)
 724 {
 725    _EGL_DECLARE_DD_AND_MODE(dpy, mode);
 726    return drv->API.GetModeAttribMESA(drv, disp, m, attribute, value);
 727 }
 728
 729
 730 EGLBoolean EGLAPIENTRY
 731 eglCopyContextMESA(EGLDisplay dpy, EGLContext source, EGLContext dest,
 732                    EGLint mask)
 733 {
 734    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 735    _EGLContext *source_context = _eglLookupContext(source, disp);
 736    _EGLContext *dest_context = _eglLookupContext(dest, disp);
 737    _EGLDriver *drv;
 738
 739    drv = _eglCheckContext(disp, source_context, __FUNCTION__);
 740    if (!drv || !dest_context) {
 741       if (drv)
 742          _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
 743       return EGL_FALSE;
 744    }
 745
 746    return drv->API.CopyContextMESA(drv, disp, source_context, dest_context,
 747                                    mask);
 748 }
 749
 750
 751 EGLBoolean
 752 eglGetScreensMESA(EGLDisplay dpy, EGLScreenMESA *screens,
 753                   EGLint max_screens, EGLint *num_screens)
 754 {
 755    _EGL_DECLARE_DD(dpy);
 756    return drv->API.GetScreensMESA(drv, disp, screens,
 757                                   max_screens, num_screens);
 758 }
 759
 760
 761 EGLSurface
 762 eglCreateScreenSurfaceMESA(EGLDisplay dpy, EGLConfig config,
 763                            const EGLint *attrib_list)
 764 {
 765    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 766    _EGLConfig *conf = _eglLookupConfig(config, disp);
 767    _EGLDriver *drv;
 768    _EGLSurface *surf;
 769
 770    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 771    if (!drv)
 772       return EGL_NO_SURFACE;
 773
 774    surf = drv->API.CreateScreenSurfaceMESA(drv, disp, conf, attrib_list);
 775    if (surf)
 776       return _eglLinkSurface(surf, disp);
 777    else
 778       return EGL_NO_SURFACE;
 779 }
 780
 781
 782 EGLBoolean
 783 eglShowScreenSurfaceMESA(EGLDisplay dpy, EGLint screen,
 784                          EGLSurface surface, EGLModeMESA mode)
 785 {
 786    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 787    _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
 788    _EGLSurface *surf = _eglLookupSurface(surface, disp);
 789    _EGLMode *m = _eglLookupMode(mode, disp);
 790    _EGLDriver *drv;
 791
 792    drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
 793    if (!drv)
 794       return EGL_FALSE;
 795    if (!surf && surface != EGL_NO_SURFACE)
 796       return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
 797    if (!m && mode != EGL_NO_MODE_MESA)
 798       return _eglError(EGL_BAD_MODE_MESA, __FUNCTION__);
 799
 800    return drv->API.ShowScreenSurfaceMESA(drv, disp, scrn, surf, m);
 801 }
 802
 803
 804 EGLBoolean
 805 eglScreenPositionMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLint x, EGLint y)
 806 {
 807    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 808    return drv->API.ScreenPositionMESA(drv, disp, scrn, x, y);
 809 }
 810
 811
 812 EGLBoolean
 813 eglQueryScreenMESA(EGLDisplay dpy, EGLScreenMESA screen,
 814                    EGLint attribute, EGLint *value)
 815 {
 816    _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
 817    return drv->API.QueryScreenMESA(drv, disp, scrn, attribute, value);
 818 }
 819
 820
 821 EGLBoolean
 822 eglQueryScreenSurfaceMESA(EGLDisplay dpy, EGLScreenMESA screen,
 823                           EGLSurface *surface)
 824 {
 825    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 826    _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
 827    _EGLDriver *drv;
 828    _EGLSurface *surf;
 829
 830    drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
 831    if (!drv)
 832       return EGL_FALSE;
 833
 834    if (drv->API.QueryScreenSurfaceMESA(drv, disp, scrn, &surf) != EGL_TRUE)
 835       surf = NULL;
 836    if (surface)
 837       *surface = _eglGetSurfaceHandle(surf);
 838    return (surf != NULL);
 839 }
 840
 841
 842 EGLBoolean
 843 eglQueryScreenModeMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *mode)
 844 {
 845    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 846    _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
 847    _EGLDriver *drv;
 848    _EGLMode *m;
 849
 850    drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
 851    if (!drv)
 852       return EGL_FALSE;
 853
 854    if (drv->API.QueryScreenModeMESA(drv, disp, scrn, &m) != EGL_TRUE)
 855       m = NULL;
 856    if (mode)
 857       *mode = m->Handle;
 858
 859    return (m != NULL);
 860 }
 861
 862
 863 const char *
 864 eglQueryModeStringMESA(EGLDisplay dpy, EGLModeMESA mode)
 865 {
 866    _EGL_DECLARE_DD_AND_MODE(dpy, mode);
 867    return drv->API.QueryModeStringMESA(drv, disp, m);
 868 }
 869
 870
 871 #endif /* EGL_MESA_screen_surface */
 872
 873
 874 /**
 875  ** EGL 1.2
 876  **/
 877
 878 #ifdef EGL_VERSION_1_2
 879
 880
 881 /**
 882  * Specify the client API to use for subsequent calls including:
 883  *  eglCreateContext()
 884  *  eglGetCurrentContext()
 885  *  eglGetCurrentDisplay()
 886  *  eglGetCurrentSurface()
 887  *  eglMakeCurrent(when the ctx parameter is EGL NO CONTEXT)
 888  *  eglWaitClient()
 889  *  eglWaitNative()
 890  * See section 3.7 "Rendering Context" in the EGL specification for details.
 891  */
 892 EGLBoolean
 893 eglBindAPI(EGLenum api)
 894 {
 895    _EGLThreadInfo *t = _eglGetCurrentThread();
 896
 897    if (_eglIsCurrentThreadDummy())
 898       return _eglError(EGL_BAD_ALLOC, "eglBindAPI");
 899
 900    if (!_eglIsApiValid(api))
 901       return _eglError(EGL_BAD_PARAMETER, "eglBindAPI");
 902
 903    t->CurrentAPIIndex = _eglConvertApiToIndex(api);
 904    return EGL_TRUE;
 905 }
 906
 907
 908 /**
 909  * Return the last value set with eglBindAPI().
 910  */
 911 EGLenum
 912 eglQueryAPI(void)
 913 {
 914    /* returns one of EGL_OPENGL_API, EGL_OPENGL_ES_API or EGL_OPENVG_API */
 915    _EGLThreadInfo *t = _eglGetCurrentThread();
 916    return _eglConvertApiFromIndex(t->CurrentAPIIndex);
 917 }
 918
 919
 920 EGLSurface
 921 eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype,
 922                                  EGLClientBuffer buffer, EGLConfig config,
 923                                  const EGLint *attrib_list)
 924 {
 925    _EGLDisplay *disp = _eglLookupDisplay(dpy);
 926    _EGLConfig *conf = _eglLookupConfig(config, disp);
 927    _EGLDriver *drv;
 928    _EGLSurface *surf;
 929
 930    drv = _eglCheckConfig(disp, conf, __FUNCTION__);
 931    if (!drv)
 932       return EGL_NO_SURFACE;
 933
 934    surf = drv->API.CreatePbufferFromClientBuffer(drv, disp, buftype, buffer,
 935                                                  conf, attrib_list);
 936    if (surf)
 937       return _eglLinkSurface(surf, disp);
 938    else
 939       return EGL_NO_SURFACE;
 940 }
 941
 942
 943 EGLBoolean
 944 eglReleaseThread(void)
 945 {
 946    /* unbind current context */
 947    if (!_eglIsCurrentThreadDummy()) {
 948       _EGLDisplay *disp = _eglGetCurrentDisplay();
 949       _EGLDriver *drv;
 950       if (disp) {
 951          drv = disp->Driver;
 952          (void) drv->API.MakeCurrent(drv, disp, NULL, NULL, NULL);
 953       }
 954    }
 955
 956    _eglDestroyCurrentThread();
 957    return EGL_TRUE;
 958 }
 959
 960
 961 EGLBoolean
 962 eglWaitClient(void)
 963 {
 964    _EGLDisplay *disp = _eglGetCurrentDisplay();
 965    _EGLDriver *drv;
 966
 967    if (!disp)
 968       return EGL_TRUE;
 969
 970    /* a current display is always initialized */
 971    drv = disp->Driver;
 972
 973    return drv->API.WaitClient(drv, disp);
 974 }
 975
 976
 977 #endif /* EGL_VERSION_1_2 */