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