src/lib/ecore_evas/ecore_evas_directfb.c

   1 #ifdef HAVE_CONFIG_H
   2 # include <config.h>
   3 #endif
   4
   5 #include <string.h>
   6
   7 #include <Ecore.h>
   8 #include "ecore_private.h"
   9 #ifdef BUILD_ECORE_EVAS_DIRECTFB
  10 #include <Ecore_DirectFB.h>
  11 #endif
  12
  13 #include "ecore_evas_private.h"
  14 #include "Ecore_Evas.h"
  15
  16 #ifdef BUILD_ECORE_EVAS_DIRECTFB
  17 static int _ecore_evas_init_count = 0;
  18 static Ecore_Event_Handler *ecore_evas_event_handlers[13];
  19
  20 static Eina_Hash *ecore_evases_hash = NULL;
  21
  22 static int
  23 _ecore_evas_directfb_render(Ecore_Evas *ee)
  24 {
  25    Eina_List *updates, *ll;
  26    Ecore_Evas *ee2;
  27    int rend = 0;
  28
  29 #ifdef BUILD_ECORE_EVAS_SOFTWARE_BUFFER
  30    EINA_LIST_FOREACH(ee->sub_ecore_evas, ll, ee2)
  31      {
  32         if (ee2->func.fn_pre_render) ee2->func.fn_pre_render(ee2);
  33         rend |= _ecore_evas_buffer_render(ee2);
  34         if (ee2->func.fn_post_render) ee2->func.fn_post_render(ee2);
  35      }
  36 #endif
  37    if (ee->func.fn_pre_render) ee->func.fn_pre_render(ee);
  38    updates = evas_render_updates(ee->evas);
  39    if (updates)
  40      {
  41         evas_render_updates_free(updates);
  42         _ecore_evas_idle_timeout_update(ee);
  43      }
  44    if (ee->func.fn_post_render) ee->func.fn_post_render(ee);
  45
  46    return updates ? 1 : rend;
  47 }
  48
  49 static char *
  50 _ecore_evas_directfb_winid_str_get(Ecore_X_Window win)
  51 {
  52    const char *vals = "qWeRtYuIoP5$&<~";
  53    static char id[9];
  54    unsigned int val;
  55    val = (unsigned int)win;
  56    id[0] = vals[(val >> 28) & 0xf];
  57    id[1] = vals[(val >> 24) & 0xf];
  58    id[2] = vals[(val >> 20) & 0xf];
  59    id[3] = vals[(val >> 16) & 0xf];
  60    id[4] = vals[(val >> 12) & 0xf];
  61    id[5] = vals[(val >>  8) & 0xf];
  62    id[6] = vals[(val >>  4) & 0xf];
  63    id[7] = vals[(val      ) & 0xf];
  64    id[8] = 0;
  65    return id;
  66 }
  67
  68 static Ecore_Evas *
  69 _ecore_evas_directfb_match(DFBWindowID win)
  70 {
  71    Ecore_Evas *ee;
  72
  73    ee = eina_hash_find(ecore_evases_hash, _ecore_evas_directfb_winid_str_get(win));
  74    return ee;
  75 }
  76
  77 static Eina_Bool
  78 _ecore_evas_directfb_event_key_down(void *data __UNUSED__, int type __UNUSED__, void *event)
  79 {
  80    Ecore_Evas *ee;
  81    Ecore_DirectFB_Event_Key_Down *e;
  82
  83    e = event;
  84    ee = _ecore_evas_directfb_match(e->win);
  85
  86    if (!ee) return EINA_TRUE; /* pass on event */
  87    evas_event_feed_key_down(ee->evas, e->name, e->name, e->string,
  88                             e->key_compose, e->time, NULL);
  89    return EINA_TRUE;
  90 }
  91
  92 static Eina_Bool
  93 _ecore_evas_directfb_event_key_up(void *data __UNUSED__, int type __UNUSED__, void *event)
  94 {
  95    Ecore_Evas *ee;
  96    Ecore_DirectFB_Event_Key_Up *e;
  97
  98    e = event;
  99    ee = _ecore_evas_directfb_match(e->win);
 100
 101    if (!ee) return EINA_TRUE; /* pass on event */
 102    evas_event_feed_key_up(ee->evas, e->name, e->name, e->string,
 103                           e->key_compose, e->time, NULL);
 104    return EINA_TRUE;
 105 }
 106
 107 static Eina_Bool
 108 _ecore_evas_directfb_event_motion(void *data __UNUSED__, int type __UNUSED__, void *event)
 109 {
 110    Ecore_Evas *ee;
 111    Ecore_DirectFB_Event_Motion *e;
 112
 113    e = event;
 114    ee = _ecore_evas_directfb_match(e->win);
 115
 116    if (!ee) return EINA_TRUE; /* pass on event */
 117    _ecore_evas_mouse_move_process(ee, e->x, e->y, e->time);
 118    return EINA_TRUE;
 119 }
 120
 121 static Eina_Bool
 122 _ecore_evas_directfb_event_button_down(void *data __UNUSED__, int type __UNUSED__, void *event)
 123 {
 124    Ecore_Evas *ee;
 125    Ecore_DirectFB_Event_Button_Down *e;
 126
 127    e = event;
 128    ee = _ecore_evas_directfb_match(e->win);
 129
 130    if (!ee) return EINA_TRUE; /* pass on event */
 131    // _ecore_evas_mouse_move_process(ee, e->x, e->y, e->time);
 132    evas_event_feed_mouse_down(ee->evas, e->button, EVAS_BUTTON_NONE, e->time, NULL);
 133    return EINA_TRUE;
 134 }
 135
 136 static Eina_Bool
 137 _ecore_evas_directfb_event_button_up(void *data __UNUSED__, int type __UNUSED__, void *event)
 138 {
 139    Ecore_Evas *ee;
 140    Ecore_DirectFB_Event_Button_Up *e;
 141    Evas_Button_Flags flags = EVAS_BUTTON_NONE;
 142
 143    e = event;
 144    ee = _ecore_evas_directfb_match(e->win);
 145
 146    if (!ee) return EINA_TRUE; /* pass on event */
 147    //_ecore_evas_mouse_move_process(ee, e->x, e->y, e->time);
 148    evas_event_feed_mouse_up(ee->evas, e->button, flags, e->time, NULL);
 149    return EINA_TRUE;
 150 }
 151
 152 static Eina_Bool
 153 _ecore_evas_directfb_event_enter(void *data __UNUSED__, int type __UNUSED__, void *event)
 154 {
 155    Ecore_Evas *ee;
 156    Ecore_DirectFB_Event_Enter *e;
 157
 158    e = event;
 159    ee = _ecore_evas_directfb_match(e->win);
 160
 161    if (!ee) return EINA_TRUE; /* pass on event */
 162    evas_event_feed_mouse_in(ee->evas, e->time, NULL);
 163    //_ecore_evas_mouse_move_process(ee, e->x, e->y, e->time);
 164    return EINA_TRUE;
 165 }
 166
 167 static Eina_Bool
 168 _ecore_evas_directfb_event_leave(void *data __UNUSED__, int type __UNUSED__, void *event)
 169 {
 170    Ecore_Evas *ee;
 171    Ecore_DirectFB_Event_Leave *e;
 172
 173    e = event;
 174    ee = _ecore_evas_directfb_match(e->win);
 175
 176    if (!ee) return EINA_TRUE; /* pass on event */
 177    evas_event_feed_mouse_out(ee->evas, e->time, NULL);
 178    //_ecore_evas_mouse_move_process(ee, e->x, e->y, e->time);
 179    if (ee->func.fn_mouse_out) ee->func.fn_mouse_out(ee);
 180    if (ee->prop.cursor.object) evas_object_hide(ee->prop.cursor.object);
 181    return EINA_TRUE;
 182 }
 183
 184 static Eina_Bool
 185 _ecore_evas_directfb_event_wheel(void *data __UNUSED__, int type __UNUSED__, void *event)
 186 {
 187    Ecore_Evas *ee;
 188    Ecore_DirectFB_Event_Wheel *e;
 189
 190    e = event;
 191    ee = _ecore_evas_directfb_match(e->win);
 192
 193    if (!ee) return EINA_TRUE; /* pass on event */
 194    evas_event_feed_mouse_wheel(ee->evas, e->direction, e->z, e->time, NULL);
 195    return EINA_TRUE;
 196 }
 197
 198 static Eina_Bool
 199 _ecore_evas_directfb_event_got_focus(void *data __UNUSED__, int type __UNUSED__, void *event)
 200 {
 201    Ecore_Evas *ee;
 202    Ecore_DirectFB_Event_Got_Focus *e;
 203
 204    e = event;
 205    ee = _ecore_evas_directfb_match(e->win);
 206
 207    if (!ee) return EINA_TRUE; /* pass on event */
 208    ee->prop.focused = 1;
 209    return EINA_TRUE;
 210 }
 211
 212 static Eina_Bool
 213 _ecore_evas_directfb_event_lost_focus(void *data __UNUSED__, int type __UNUSED__, void *event)
 214 {
 215    Ecore_Evas *ee;
 216    Ecore_DirectFB_Event_Lost_Focus *e;
 217
 218    e = event;
 219    ee = _ecore_evas_directfb_match(e->win);
 220
 221    if (!ee) return EINA_TRUE; /* pass on event */
 222    ee->prop.focused = 0;
 223    return EINA_TRUE;
 224 }
 225
 226 int
 227 _ecore_evas_directfb_shutdown(void)
 228 {
 229    _ecore_evas_init_count--;
 230    if (_ecore_evas_init_count == 0)
 231      {
 232         int i;
 233
 234         for (i = 0; i < 8; i++)
 235           ecore_event_handler_del(ecore_evas_event_handlers[i]);
 236      }
 237    if (_ecore_evas_init_count < 0) _ecore_evas_init_count = 0;
 238    return _ecore_evas_init_count;
 239 }
 240
 241
 242
 243
 244
 245 int
 246 _ecore_evas_directfb_init(void)
 247 {
 248    _ecore_evas_init_count++;
 249    if (_ecore_evas_init_count > 1) return _ecore_evas_init_count;
 250
 251    ecore_evas_event_handlers[0]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_KEY_DOWN, _ecore_evas_directfb_event_key_down, NULL);
 252    ecore_evas_event_handlers[1]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_KEY_UP, _ecore_evas_directfb_event_key_up, NULL);
 253    ecore_evas_event_handlers[2]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_BUTTON_DOWN, _ecore_evas_directfb_event_button_down, NULL);
 254    ecore_evas_event_handlers[3]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_BUTTON_UP, _ecore_evas_directfb_event_button_up, NULL);
 255    ecore_evas_event_handlers[4]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_MOTION, _ecore_evas_directfb_event_motion, NULL);
 256    ecore_evas_event_handlers[5]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_ENTER, _ecore_evas_directfb_event_enter, NULL);
 257    ecore_evas_event_handlers[6]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_LEAVE, _ecore_evas_directfb_event_leave, NULL);
 258    ecore_evas_event_handlers[7]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_WHEEL, _ecore_evas_directfb_event_wheel, NULL);
 259    ecore_evas_event_handlers[8]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_GOT_FOCUS, _ecore_evas_directfb_event_got_focus, NULL);
 260    ecore_evas_event_handlers[9]  = ecore_event_handler_add(ECORE_DIRECTFB_EVENT_LOST_FOCUS, _ecore_evas_directfb_event_lost_focus, NULL);
 261    ecore_evas_event_handlers[10]  = NULL;
 262    ecore_evas_event_handlers[11]  = NULL;
 263    ecore_evas_event_handlers[12]  = NULL;
 264
 265    return _ecore_evas_init_count;
 266 }
 267
 268 /* engine functions */
 269 /********************/
 270
 271 static void
 272 _ecore_evas_directfb_free(Ecore_Evas *ee)
 273 {
 274    eina_hash_del(ecore_evases_hash, _ecore_evas_directfb_winid_str_get(ee->engine.directfb.window->id), ee);
 275    ecore_directfb_window_free(ee->engine.directfb.window);
 276    _ecore_evas_directfb_shutdown();
 277    ecore_directfb_shutdown();
 278 }
 279
 280 static void
 281 _ecore_evas_directfb_move(Ecore_Evas *ee, int x, int y)
 282 {
 283    ecore_directfb_window_move(ee->engine.directfb.window, x, y);
 284 }
 285
 286 static void
 287 _ecore_evas_directfb_resize(Ecore_Evas *ee, int w, int h)
 288 {
 289    if ((w == ee->w) && (h == ee->h)) return;
 290    ecore_directfb_window_resize(ee->engine.directfb.window, w, h);
 291    ee->w = w;
 292    ee->h = h;
 293    if ((ee->rotation == 90) || (ee->rotation == 270))
 294      {
 295         evas_output_size_set(ee->evas, ee->h, ee->w);
 296         evas_output_viewport_set(ee->evas, 0, 0, ee->h, ee->w);
 297      }
 298    else
 299      {
 300         evas_output_size_set(ee->evas, ee->w, ee->h);
 301         evas_output_viewport_set(ee->evas, 0, 0, ee->w, ee->h);
 302      }
 303 }
 304
 305 static void
 306 _ecore_evas_directfb_focus_set(Ecore_Evas *ee, int on __UNUSED__)
 307 {
 308    ecore_directfb_window_focus(ee->engine.directfb.window);
 309 }
 310
 311 static void
 312 _ecore_evas_directfb_hide(Ecore_Evas *ee)
 313 {
 314    ecore_directfb_window_hide(ee->engine.directfb.window);
 315    ee->should_be_visible = 0;
 316 }
 317
 318 static void
 319 _ecore_evas_directfb_show(Ecore_Evas *ee)
 320 {
 321    ecore_directfb_window_show(ee->engine.directfb.window);
 322    ee->should_be_visible = 1;
 323 }
 324
 325 static void
 326 _ecore_evas_directfb_shaped_set(Ecore_Evas *ee, int shaped)
 327 {
 328    if (((ee->shaped) && (shaped)) || ((!ee->shaped) && (!shaped)))
 329      return;
 330    ee->shaped = shaped;
 331    if(ee->shaped)
 332      ecore_directfb_window_shaped_set(ee->engine.directfb.window, 1);
 333    else
 334      ecore_directfb_window_shaped_set(ee->engine.directfb.window, 0);
 335
 336 }
 337
 338 static void
 339 _ecore_evas_object_cursor_del(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
 340 {
 341    Ecore_Evas *ee;
 342
 343    ee = data;
 344    if (ee)
 345      ee->prop.cursor.object = NULL;
 346 }
 347
 348 static void
 349 _ecore_evas_directfb_object_cursor_set(Ecore_Evas *ee, Evas_Object *obj, int layer, int hot_x, int hot_y)
 350 {
 351    int x, y;
 352
 353    if (ee->prop.cursor.object) evas_object_del(ee->prop.cursor.object);
 354
 355    if (!obj)
 356      {
 357         ee->prop.cursor.object = NULL;
 358         ee->prop.cursor.layer = 0;
 359         ee->prop.cursor.hot.x = 0;
 360         ee->prop.cursor.hot.y = 0;
 361         ecore_directfb_window_cursor_show(ee->engine.directfb.window, 1);
 362         return;
 363
 364      }
 365
 366    ee->prop.cursor.object = obj;
 367    ee->prop.cursor.layer = layer;
 368    ee->prop.cursor.hot.x = hot_x;
 369    ee->prop.cursor.hot.y = hot_y;
 370
 371    ecore_directfb_window_cursor_show(ee->engine.directfb.window, 0);
 372
 373    evas_pointer_output_xy_get(ee->evas, &x, &y);
 374    evas_object_layer_set(ee->prop.cursor.object, ee->prop.cursor.layer);
 375    evas_object_move(ee->prop.cursor.object,x - ee->prop.cursor.hot.x,y - ee->prop.cursor.hot.y);
 376    evas_object_pass_events_set(ee->prop.cursor.object, 1);
 377    if (evas_pointer_inside_get(ee->evas))
 378      evas_object_show(ee->prop.cursor.object);
 379
 380    evas_object_event_callback_add(obj, EVAS_CALLBACK_DEL, _ecore_evas_object_cursor_del, ee);
 381 }
 382
 383 static void
 384 _ecore_evas_directfb_fullscreen_set(Ecore_Evas *ee, int on)
 385 {
 386    Evas_Engine_Info_DirectFB *einfo;
 387    int w;
 388    int h;
 389    int resized = 0;
 390
 391    if (((ee->prop.fullscreen) && (on)) || ((!ee->prop.fullscreen) && (!on)))
 392      return;
 393
 394    if (on)
 395      ecore_directfb_window_fullscreen_set(ee->engine.directfb.window, 1);
 396    else
 397      ecore_directfb_window_fullscreen_set(ee->engine.directfb.window, 0);
 398    /* set the new size of the evas */
 399    ecore_directfb_window_size_get(ee->engine.directfb.window, &w, &h);
 400    if( (ee->w != w) || (ee->h != h))
 401      {
 402         resized = 1;
 403         ee->w = w;
 404         ee->h = h;
 405         if ((ee->rotation == 90) || (ee->rotation == 270))
 406           {
 407              evas_output_size_set(ee->evas, ee->h, ee->w);
 408              evas_output_viewport_set(ee->evas, 0, 0, ee->h, ee->w);
 409           }
 410         else
 411           {
 412              evas_output_size_set(ee->evas, ee->w, ee->h);
 413              evas_output_viewport_set(ee->evas, 0, 0, ee->w, ee->h);
 414           }
 415      }
 416    einfo = (Evas_Engine_Info_DirectFB *)evas_engine_info_get(ee->evas);
 417    if (einfo)
 418      {
 419         einfo->info.surface = ee->engine.directfb.window->surface;
 420         if (!evas_engine_info_set(ee->evas, (Evas_Engine_Info *)einfo))
 421           {
 422              ERR("evas_engine_info_set() for engine '%s' failed.", ee->driver);
 423           }
 424      }
 425    ee->prop.fullscreen = on;
 426    if (resized)
 427      {
 428         if(ee->func.fn_resize) ee->func.fn_resize(ee);
 429      }
 430 }
 431
 432 static void *
 433 _ecore_evas_directfb_window_get(const Ecore_Evas *ee)
 434 {
 435    return ee->engine.directfb.window;
 436 }
 437 #endif
 438
 439 #ifdef BUILD_ECORE_EVAS_DIRECTFB
 440 static Ecore_Evas_Engine_Func _ecore_directfb_engine_func =
 441 {
 442    _ecore_evas_directfb_free,        /* free an ecore_evas */
 443      NULL,                                /* cb resize */
 444      NULL,                                /* cb move */
 445      NULL,                                /* cb show */
 446      NULL,                                /* cb hide */
 447      NULL,                                /* cb delete request */
 448      NULL,                                /* cb destroy */
 449      NULL,                                /* cb focus in */
 450      NULL,                                /* cb focus out */
 451      NULL,                              /* cb sticky */
 452      NULL,                              /* cb unsticky */
 453      NULL,                                /* cb mouse in */
 454      NULL,                                /* cb mouse out */
 455      NULL,                                /* cb pre render */
 456      NULL,                                /* cb post render */
 457      _ecore_evas_directfb_move,                /* move */
 458      NULL,                              /* managed move */
 459      _ecore_evas_directfb_resize,        /* resize */
 460      NULL,                                /* move resize */
 461      NULL,//_ecore_evas_directfb_rotation_set,/* rotation */
 462      _ecore_evas_directfb_shaped_set,   /* shaped */
 463      _ecore_evas_directfb_show,                /* show */
 464      _ecore_evas_directfb_hide,                /* hide */
 465      NULL,                                /* raise */
 466      NULL,                                /* lower */
 467      NULL,                                /* activate */
 468      NULL,                                /* title set */
 469      NULL,                                /* name class set */
 470      NULL,                                /* size min */
 471      NULL,                                /* size max */
 472      NULL,                                /* size base */
 473      NULL,                                /* size step */
 474      _ecore_evas_directfb_object_cursor_set, /* set cursor to an evas object */
 475      NULL,                                /* layer set */
 476      _ecore_evas_directfb_focus_set,        /* focus */
 477      NULL,                                /* iconified */
 478      NULL,                                /* borderless */
 479      NULL,                                /* override */
 480      NULL,                                /* maximized */
 481      _ecore_evas_directfb_fullscreen_set,/* fullscreen */
 482      NULL,                                /* avoid damage */
 483      NULL,                                /* withdrawn */
 484      NULL,                                /* sticky */
 485      NULL,                              /* ignore events */
 486      NULL,                              /* alpha */
 487      NULL, //transparent
 488
 489      NULL // render
 490 };
 491 #endif
 492
 493 /* api */
 494 /*******/
 495
 496 #ifdef BUILD_ECORE_EVAS_DIRECTFB
 497 EAPI Ecore_Evas *
 498 ecore_evas_directfb_new(const char *disp_name, int windowed, int x, int y, int w, int h)
 499 {
 500    Evas_Engine_Info_DirectFB *einfo;
 501    Ecore_Evas *ee;
 502    Ecore_DirectFB_Window *window;
 503    int rmethod;
 504
 505    rmethod = evas_render_method_lookup("directfb");
 506    if (!rmethod) return NULL;
 507    if (!ecore_directfb_init(disp_name)) return NULL;
 508    ee = calloc(1, sizeof(Ecore_Evas));
 509    if (!ee) return NULL;
 510
 511    ECORE_MAGIC_SET(ee, ECORE_MAGIC_EVAS);
 512    _ecore_evas_directfb_init();
 513    ee->engine.func = (Ecore_Evas_Engine_Func *)&_ecore_directfb_engine_func;
 514
 515    ee->driver = "directfb";
 516    if (disp_name) ee->name = strdup(disp_name);
 517
 518    if (w < 1) w = 1;
 519    if (h < 1) h = 1;
 520
 521    ee->rotation = 0;
 522    ee->visible = 1;
 523    ee->x = x;
 524    ee->y = y;
 525    ee->w = w;
 526    ee->h = h;
 527    ee->prop.layer = 1;
 528    ee->prop.fullscreen = 0;
 529
 530    /* init evas here */
 531    ee->evas = evas_new();
 532    evas_data_attach_set(ee->evas, ee);
 533    evas_output_method_set(ee->evas, rmethod);
 534    evas_output_size_set(ee->evas, w, h);
 535    evas_output_viewport_set(ee->evas, 0, 0, w, h);
 536    einfo = (Evas_Engine_Info_DirectFB *)evas_engine_info_get(ee->evas);
 537
 538    window = ecore_directfb_window_new(x,y,w,h);
 539    ee->engine.directfb.window = window;
 540    if (einfo)
 541      {
 542         einfo->info.dfb = ecore_directfb_interface_get();
 543         einfo->info.surface = window->surface;
 544         if (!evas_engine_info_set(ee->evas, (Evas_Engine_Info *)einfo))
 545           {
 546              ERR("evas_engine_info_set() for engine '%s' failed.", ee->driver);
 547           }
 548      }
 549
 550    ee->engine.func->fn_render = _ecore_evas_directfb_render;
 551    _ecore_evas_register(ee);
 552
 553    if (!ecore_evases_hash)
 554      ecore_evases_hash = eina_hash_string_superfast_new(NULL);
 555    eina_hash_add(ecore_evases_hash, _ecore_evas_directfb_winid_str_get(ee->engine.directfb.window->id), ee);
 556
 557    return ee;
 558 }
 559 #else
 560 EAPI Ecore_Evas *
 561 ecore_evas_directfb_new(const char *disp_name __UNUSED__, int windowed __UNUSED__, int x __UNUSED__, int y __UNUSED__, int w __UNUSED__, int h __UNUSED__)
 562 {
 563    return NULL;
 564 }
 565 #endif
 566
 567 #ifdef BUILD_ECORE_EVAS_DIRECTFB
 568 EAPI Ecore_DirectFB_Window *
 569 ecore_evas_directfb_window_get(const Ecore_Evas *ee)
 570 {
 571    return (Ecore_DirectFB_Window *) _ecore_evas_directfb_window_get(ee);
 572 }
 573 #else
 574 EAPI Ecore_DirectFB_Window *
 575 ecore_evas_directfb_window_get(const Ecore_Evas *ee __UNUSED__)
 576 {
 577   return NULL;
 578 }
 579 #endif