git.oblomov.eu Git - wine/blob - dlls/twain/ds_ctrl.c

   1 /*
   2  * Copyright 2000 Corel Corporation
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include "twain.h"
  22 #include "twain_i.h"
  23 #include "wine/debug.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  26
  27 /* DG_CONTROL/DAT_CAPABILITY/MSG_GET */
  28 TW_UINT16 TWAIN_CapabilityGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
  29                                TW_MEMREF pData)
  30 {
  31     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
  32     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
  33     activeDS *pSource = TWAIN_LookupSource (pDest);
  34
  35     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_GET\n");
  36
  37     if (!pDest)
  38     {
  39         twRC = TWRC_FAILURE;
  40         DSM_twCC = TWCC_BADDEST;
  41     }
  42     else if (pSource->currentState < 4 || pSource->currentState > 7)
  43     {
  44         twRC = TWRC_FAILURE;
  45         pSource->twCC = TWCC_SEQERROR;
  46     }
  47     else
  48     {
  49         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_GET);
  50         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
  51         pSource->twCC = twCC;
  52     }
  53
  54     return twRC;
  55 }
  56
  57 /* DG_CONTROL/DAT_CAPABILITY/MSG_GETCURRENT */
  58 TW_UINT16 TWAIN_CapabilityGetCurrent (pTW_IDENTITY pOrigin,
  59                                       pTW_IDENTITY pDest,TW_MEMREF pData)
  60 {
  61     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
  62     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
  63     activeDS *pSource = TWAIN_LookupSource (pDest);
  64
  65     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_GETCURRENT\n");
  66
  67     if (!pSource)
  68     {
  69         twRC = TWRC_FAILURE;
  70         DSM_twCC = TWCC_BADDEST;
  71     }
  72     else if (pSource->currentState < 4 || pSource->currentState > 7)
  73     {
  74         twRC = TWRC_FAILURE;
  75         pSource->twCC = TWCC_SEQERROR;
  76     }
  77     else
  78     {
  79         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_GETCURRENT);
  80         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
  81         pSource->twCC = twCC;
  82     }
  83
  84     return twRC;
  85 }
  86
  87 /* DG_CONTROL/DAT_CAPABILITY/MSG_GETDEFAULT */
  88 TW_UINT16 TWAIN_CapabilityGetDefault (pTW_IDENTITY pOrigin,
  89                                       pTW_IDENTITY pDest, TW_MEMREF pData)
  90 {
  91     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
  92     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
  93     activeDS *pSource = TWAIN_LookupSource (pDest);
  94
  95     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_GETDEFAULT\n");
  96
  97     if (!pDest)
  98     {
  99         twRC = TWRC_FAILURE;
 100         DSM_twCC = TWCC_BADDEST;
 101     }
 102     else if (pSource->currentState < 4 || pSource->currentState > 7)
 103     {
 104         twRC = TWRC_FAILURE;
 105         pSource->twCC = TWCC_SEQERROR;
 106     }
 107     else
 108     {
 109         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_GETDEFAULT);
 110         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
 111         pSource->twCC = twCC;
 112     }
 113
 114     return twRC;
 115 }
 116
 117 /* DG_CONTROL/DAT_CAPABILITY/MSG_QUERYSUPPORT */
 118 TW_UINT16 TWAIN_CapabilityQuerySupport (pTW_IDENTITY pOrigin,
 119                                         pTW_IDENTITY pDest, TW_MEMREF pData)
 120 {
 121     FIXME ("stub!\n");
 122
 123     return TWRC_FAILURE;
 124 }
 125
 126 /* DG_CONTROL/DAT_CAPABILITY/MSG_RESET */
 127 TW_UINT16 TWAIN_CapabilityReset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 128                                  TW_MEMREF pData)
 129 {
 130     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
 131     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
 132     activeDS *pSource = TWAIN_LookupSource (pDest);
 133
 134     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_RESET\n");
 135
 136     if (!pDest)
 137     {
 138         twRC = TWRC_FAILURE;
 139         DSM_twCC = TWCC_BADDEST;
 140     }
 141     else if (pSource->currentState < 4 || pSource->currentState > 7)
 142     {
 143         twRC = TWRC_FAILURE;
 144         pSource->twCC = TWCC_SEQERROR;
 145     }
 146     else
 147     {
 148         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_RESET);
 149         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
 150         pSource->twCC = twCC;
 151     }
 152
 153     return twRC;
 154 }
 155
 156 /* DG_CONTROL/DAT_CAPABILITY/MSG_SET */
 157 TW_UINT16 TWAIN_CapabilitySet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 158                                TW_MEMREF pData)
 159 {
 160     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
 161     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
 162     activeDS *pSource = TWAIN_LookupSource (pDest);
 163
 164     TRACE ("DG_CONTROL/DAT_CAPABILITY/MSG_SET\n");
 165
 166     if (!pSource)
 167     {
 168         twRC = TWRC_FAILURE;
 169         DSM_twCC = TWCC_BADDEST;
 170     }
 171     else if (pSource->currentState != 4)
 172     {
 173         twRC = TWRC_FAILURE;
 174         pSource->twCC = TWCC_SEQERROR;
 175     }
 176     else
 177     {
 178         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_SET);
 179         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
 180         pSource->twCC = twCC;
 181     }
 182     return twRC;
 183 }
 184
 185 /* DG_CONTROL/DAT_CUSTOMDSDATA/MSG_GET */
 186 TW_UINT16 TWAIN_CustomDSDataGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 187                                 TW_MEMREF pData)
 188 {
 189     FIXME ("stub!\n");
 190
 191     return TWRC_FAILURE;
 192 }
 193
 194 /* DG_CONTROL/DAT_CUSTOMDSDATA/MSG_SET */
 195 TW_UINT16 TWAIN_CustomDSDataSet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 196                                  TW_MEMREF pData)
 197 {
 198     FIXME ("stub!\n");
 199
 200     return TWRC_FAILURE;
 201 }
 202
 203 /* DG_CONTROL/DAT_FILESYSTEM/MSG_AUTOMATICCAPTUREDIRECTORY */
 204 TW_UINT16 TWAIN_AutomaticCaptureDirectory (pTW_IDENTITY pOrigin,
 205                                            pTW_IDENTITY pDest,
 206                                            TW_MEMREF pData)
 207 {
 208     FIXME ("stub!\n");
 209
 210     return TWRC_FAILURE;
 211 }
 212
 213 /* DG_CONTROL/DAT_FILESYSTEM/MSG_CHANGEDIRECTORY */
 214 TW_UINT16 TWAIN_ChangeDirectory (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 215                                  TW_MEMREF pData)
 216 {
 217     FIXME ("stub!\n");
 218
 219     return TWRC_FAILURE;
 220 }
 221
 222 /* DG_CONTROL/DAT_FILESYSTEM/MSG_COPY */
 223 TW_UINT16 TWAIN_FileSystemCopy (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 224                                 TW_MEMREF pData)
 225 {
 226     FIXME ("stub!\n");
 227
 228     return TWRC_FAILURE;
 229 }
 230
 231 /* DG_CONTROL/DAT_FILESYSTEM/MSG_CREATEDIRECTORY */
 232 TW_UINT16 TWAIN_CreateDirectory (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 233                                  TW_MEMREF pData)
 234 {
 235     FIXME ("stub!\n");
 236
 237     return TWRC_FAILURE;
 238 }
 239
 240 /* DG_CONTROL/DAT_FILESYSTEM/MSG_DELETE */
 241 TW_UINT16 TWAIN_FileSystemDelete (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 242                                   TW_MEMREF pData)
 243 {
 244     FIXME ("stub!\n");
 245
 246     return TWRC_FAILURE;
 247 }
 248
 249 /* DG_CONTROL/DAT_FILESYSTEM/MSG_FORMATMEDIA */
 250 TW_UINT16 TWAIN_FormatMedia (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 251                              TW_MEMREF pData)
 252 {
 253     FIXME ("stub!\n");
 254
 255     return TWRC_FAILURE;
 256 }
 257
 258 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETCLOSE */
 259 TW_UINT16 TWAIN_FileSystemGetClose (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 260                                     TW_MEMREF pData)
 261 {
 262     FIXME ("stub!\n");
 263
 264     return TWRC_FAILURE;
 265 }
 266
 267 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETFIRSTFILE */
 268 TW_UINT16 TWAIN_FileSystemGetFirstFile (pTW_IDENTITY pOrigin,
 269                                         pTW_IDENTITY pDest,
 270                                         TW_MEMREF pData)
 271 {
 272     FIXME ("stub!\n");
 273
 274     return TWRC_FAILURE;
 275 }
 276
 277 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETINFO */
 278 TW_UINT16 TWAIN_FileSystemGetInfo (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 279                                    TW_MEMREF pData)
 280 {
 281     FIXME ("stub!\n");
 282
 283     return TWRC_FAILURE;
 284 }
 285
 286 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETNEXTFILE */
 287 TW_UINT16 TWAIN_FileSystemGetNextFile (pTW_IDENTITY pOrigin,
 288                                        pTW_IDENTITY pDest,
 289                                        TW_MEMREF pData)
 290 {
 291     FIXME ("stub!\n");
 292
 293     return TWRC_FAILURE;
 294 }
 295
 296 /* DG_CONTROL/DAT_FILESYSTEM/MSG_RENAME */
 297 TW_UINT16 TWAIN_FileSystemRename (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 298                                   TW_MEMREF pData)
 299 {
 300     FIXME ("stub!\n");
 301
 302     return TWRC_FAILURE;
 303 }
 304
 305 /* DG_CONTROL/DAT_EVENT/MSG_PROCESSEVENT */
 306 TW_UINT16 TWAIN_ProcessEvent (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 307                               TW_MEMREF pData)
 308 {
 309     TW_UINT16 twRC = TWRC_SUCCESS;
 310     pTW_EVENT pEvent = (pTW_EVENT) pData;
 311     activeDS *pSource = TWAIN_LookupSource (pDest);
 312
 313     TRACE("DG_CONTROL/DAT_EVENT/MSG_PROCESSEVENT\n");
 314
 315     if (!pSource)
 316     {
 317          twRC = TWRC_FAILURE;
 318          DSM_twCC = TWCC_BADDEST;
 319     }
 320     else if (pSource->currentState < 5 || pSource->currentState > 7)
 321     {
 322         twRC = TWRC_FAILURE;
 323         pSource->twCC = TWCC_SEQERROR;
 324     }
 325     else
 326     {
 327         if (pSource->pendingEvent.TWMessage != MSG_NULL)
 328         {
 329             pEvent->TWMessage = pSource->pendingEvent.TWMessage;
 330             pSource->pendingEvent.TWMessage = MSG_NULL;
 331             twRC = TWRC_DSEVENT;
 332         }
 333         else
 334         {
 335             pEvent->TWMessage = MSG_NULL;  /* no message to the application */
 336             twRC = TWRC_NOTDSEVENT;
 337         }
 338         pSource->twCC = TWCC_SUCCESS;
 339     }
 340
 341     return twRC;
 342 }
 343
 344 /* DG_CONTROL/DAT_PASSTHRU/MSG_PASSTHRU */
 345 TW_UINT16 TWAIN_PassThrough (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 346                              TW_MEMREF pData)
 347 {
 348     FIXME ("stub!\n");
 349
 350     return TWRC_FAILURE;
 351 }
 352
 353 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_ENDXFER */
 354 TW_UINT16 TWAIN_PendingXfersEndXfer (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 355                                      TW_MEMREF pData)
 356 {
 357     TW_UINT16 twRC = TWRC_SUCCESS;
 358     pTW_PENDINGXFERS pPendingXfers = (pTW_PENDINGXFERS) pData;
 359     activeDS *pSource = TWAIN_LookupSource (pData);
 360
 361     TRACE("DG_CONTROL/DAT_PENDINGXFERS/MSG_ENDXFER\n");
 362
 363     if (!pSource)
 364     {
 365         twRC = TWRC_FAILURE;
 366         DSM_twCC = TWCC_BADDEST;
 367     }
 368     else if (pSource->currentState != 6 && pSource->currentState != 7)
 369     {
 370         twRC = TWRC_FAILURE;
 371         pSource->twCC = TWCC_SEQERROR;
 372     }
 373     else
 374     {
 375         if (pPendingXfers->Count != 0)
 376         {
 377             pPendingXfers->Count --;
 378             pSource->currentState = 6;
 379         }
 380         else
 381         {
 382             pSource->currentState = 5;
 383             /* Notify the application that it can close the data source */
 384             pSource->pendingEvent.TWMessage = MSG_CLOSEDSREQ;
 385         }
 386         twRC = TWRC_SUCCESS;
 387         pSource->twCC = TWCC_SUCCESS;
 388     }
 389
 390     return twRC;
 391 }
 392
 393 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_GET */
 394 TW_UINT16 TWAIN_PendingXfersGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 395                                  TW_MEMREF pData)
 396 {
 397     TW_UINT16 twRC = TWRC_SUCCESS;
 398     pTW_PENDINGXFERS pPendingXfers = (pTW_PENDINGXFERS) pData;
 399     activeDS *pSource = TWAIN_LookupSource (pDest);
 400
 401     TRACE("DG_CONTROL/DAT_PENDINGXFERS/MSG_GET\n");
 402
 403     if (!pSource)
 404     {
 405         twRC = TWRC_FAILURE;
 406         DSM_twCC = TWCC_BADDEST;
 407     }
 408     else if (pSource->currentState < 4 || pSource->currentState > 7)
 409     {
 410         twRC = TWRC_FAILURE;
 411         DSM_twCC = TWCC_SEQERROR;
 412     }
 413     else
 414     {
 415         /* FIXME: we shouldn't return 1 here */
 416         pPendingXfers->Count = 1;
 417         twRC = TWRC_SUCCESS;
 418         pSource->twCC = TWCC_SUCCESS;
 419     }
 420
 421     return twRC;
 422 }
 423
 424 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_RESET */
 425 TW_UINT16 TWAIN_PendingXfersReset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 426                                    TW_MEMREF pData)
 427 {
 428     TW_UINT16 twRC = TWRC_SUCCESS;
 429     pTW_PENDINGXFERS pPendingXfers = (pTW_PENDINGXFERS) pData;
 430     activeDS *pSource = TWAIN_LookupSource (pDest);
 431
 432     TRACE("DG_CONTROL/DAT_PENDINGXFERS/MSG_RESET\n");
 433
 434     if (!pSource)
 435     {
 436         twRC = TWRC_FAILURE;
 437         DSM_twCC = TWCC_BADDEST;
 438     }
 439     else if (pSource->currentState != 6)
 440     {
 441         twRC = TWRC_FAILURE;
 442         DSM_twCC = TWCC_SEQERROR;
 443     }
 444     else
 445     {
 446         pPendingXfers->Count = 0;
 447         pSource->currentState = 5;
 448         twRC = TWRC_SUCCESS;
 449         pSource->twCC = TWCC_SUCCESS;
 450     }
 451
 452     return twRC;
 453 }
 454
 455 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_STOPFEEDER */
 456 TW_UINT16 TWAIN_PendingXfersStopFeeder (pTW_IDENTITY pOrigin,
 457                                         pTW_IDENTITY pDest, TW_MEMREF pData)
 458 {
 459     FIXME ("stub!\n");
 460
 461     return TWRC_FAILURE;
 462 }
 463
 464 /* DG_CONTROL/DAT_SETUPFILEXFER/MSG_GET */
 465 TW_UINT16 TWAIN_SetupFileXferGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 466                                   TW_MEMREF pData)
 467 {
 468     FIXME ("stub!\n");
 469
 470     return TWRC_FAILURE;
 471 }
 472
 473 /* DG_CONTROL/DAT_SETUPXFER/MSG_GETDEFAULT */
 474 TW_UINT16 TWAIN_SetupFileXferGetDefault (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 475                                          TW_MEMREF pData)
 476 {
 477     FIXME ("stub!\n");
 478
 479     return TWRC_FAILURE;
 480 }
 481
 482
 483 /* DG_CONTROL/DAT_SETUPFILEXFER/MSG_RESET */
 484 TW_UINT16 TWAIN_SetupFileXferReset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 485                                     TW_MEMREF pData)
 486 {
 487     FIXME ("stub!\n");
 488
 489     return TWRC_FAILURE;
 490 }
 491
 492 /* DG_CONTROL/DAT_SETUPFILEXFER/MSG_SET */
 493 TW_UINT16 TWAIN_SetupFileXferSet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 494                                   TW_MEMREF pData)
 495 {
 496     FIXME ("stub!\n");
 497
 498     return TWRC_FAILURE;
 499 }
 500
 501 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_GET */
 502 TW_UINT16 TWAIN_SetupFileXfer2Get (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 503                                    TW_MEMREF pData)
 504 {
 505     FIXME ("stub!\n");
 506
 507     return TWRC_FAILURE;
 508 }
 509
 510 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_GETDEFAULT */
 511 TW_UINT16 TWAIN_SetupFileXfer2GetDefault (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 512                                          TW_MEMREF pData)
 513 {
 514     FIXME ("stub!\n");
 515
 516     return TWRC_FAILURE;
 517 }
 518
 519 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_RESET */
 520 TW_UINT16 TWAIN_SetupFileXfer2Reset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 521                                   TW_MEMREF pData)
 522 {
 523     FIXME ("stub!\n");
 524
 525     return TWRC_FAILURE;
 526 }
 527
 528 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_SET */
 529 TW_UINT16 TWAIN_SetupFileXfer2Set (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 530                                   TW_MEMREF pData)
 531 {
 532     FIXME ("stub!\n");
 533
 534     return TWRC_FAILURE;
 535 }
 536
 537 /* DG_CONTROL/DAT_SETUPMEMXFER/MSG_GET */
 538 TW_UINT16 TWAIN_SetupMemXferGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 539                                   TW_MEMREF pData)
 540 {
 541     FIXME ("stub!\n");
 542
 543     return TWRC_FAILURE;
 544 }
 545
 546 /* DG_CONTROL/DAT_STATUS/MSG_GET */
 547 TW_UINT16 TWAIN_GetDSStatus (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 548                              TW_MEMREF pData)
 549 {
 550     TW_UINT16 twRC = TWRC_FAILURE;
 551     pTW_STATUS pSourceStatus = (pTW_STATUS) pData;
 552     activeDS *pSource = TWAIN_LookupSource (pDest);
 553
 554     TRACE ("DG_CONTROL/DAT_STATUS/MSG_GET\n");
 555
 556     if (!pSource)
 557     {
 558         twRC = TWRC_FAILURE;
 559         DSM_twCC = TWCC_BADDEST;
 560         pSourceStatus->ConditionCode = TWCC_BADDEST;
 561     }
 562     else
 563     {
 564         twRC = TWRC_SUCCESS;
 565         pSourceStatus->ConditionCode = pSource->twCC;
 566         /* Reset the condition code */
 567         pSource->twCC = TWCC_SUCCESS;
 568     }
 569
 570     return twRC;
 571 }
 572
 573 /* DG_CONTROL/DAT_USERINTERFACE/MSG_DISABLEDS */
 574 TW_UINT16 TWAIN_DisableDSUserInterface (pTW_IDENTITY pOrigin,
 575                                         pTW_IDENTITY pDest, TW_MEMREF pData)
 576 {
 577     TW_UINT16 twRC = TWRC_SUCCESS;
 578     activeDS *pSource = TWAIN_LookupSource (pDest);
 579
 580     TRACE ("DG_CONTROL/DAT_USERINTERFACE/MSG_DISABLEDS\n");
 581
 582     if (!pSource)
 583     {
 584         twRC = TWRC_FAILURE;
 585         DSM_twCC = TWCC_BADDEST;
 586     }
 587     else if (pSource->currentState != 5)
 588     {
 589         twRC = TWRC_FAILURE;
 590         pSource->twCC = TWCC_SEQERROR;
 591     }
 592     else
 593     {
 594         pSource->currentState = 4;
 595         twRC = TWRC_SUCCESS;
 596         pSource->twCC = TWCC_SUCCESS;
 597     }
 598
 599     return twRC;
 600 }
 601
 602 /* DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDS */
 603 TW_UINT16 TWAIN_EnableDSUserInterface (pTW_IDENTITY pOrigin,
 604                                        pTW_IDENTITY pDest, TW_MEMREF pData)
 605 {
 606     TW_UINT16 twRC = TWRC_SUCCESS;
 607     pTW_USERINTERFACE pUserInterface = (pTW_USERINTERFACE) pData;
 608     activeDS *pSource = TWAIN_LookupSource (pDest);
 609
 610     TRACE ("DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDS\n");
 611
 612     if (!pSource)
 613     {
 614         twRC = TWRC_FAILURE;
 615         DSM_twCC = TWCC_BADDEST;
 616     }
 617     else if (pSource->currentState != 4)
 618     {
 619         twRC = TWRC_FAILURE;
 620         pSource->twCC = TWCC_SEQERROR;
 621     }
 622     else
 623     {
 624         if (pUserInterface->ShowUI)
 625         {
 626             pSource->currentState = 5; /* Transitions to state 5 */
 627             /* FIXME: we should replace xscanimage with our own device UI */
 628             system ("xscanimage");
 629             pSource->currentState = 6;
 630             pSource->pendingEvent.TWMessage = MSG_XFERREADY;
 631         }
 632         else
 633         {
 634             /* no UI will be displayed, so source is ready to transfer data */
 635             pSource->pendingEvent.TWMessage = MSG_XFERREADY;
 636             pSource->currentState = 6; /* Transitions to state 6 directly */
 637         }
 638
 639         pSource->hwndOwner = pUserInterface->hParent;
 640         twRC = TWRC_SUCCESS;
 641         pSource->twCC = TWCC_SUCCESS;
 642     }
 643
 644     return twRC;
 645 }
 646
 647 /* DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDSUIONLY */
 648 TW_UINT16 TWAIN_EnableDSUIOnly (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 649                                 TW_MEMREF pData)
 650 {
 651     TW_UINT16 twRC = TWRC_SUCCESS;
 652     activeDS *pSource = TWAIN_LookupSource (pDest);
 653
 654     TRACE("DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDSUIONLY\n");
 655
 656     if (!pSource)
 657     {
 658         twRC = TWRC_FAILURE;
 659         DSM_twCC = TWCC_BADDEST;
 660     }
 661     else if (pSource->currentState != 4)
 662     {
 663         twRC = TWRC_FAILURE;
 664         pSource->twCC = TWCC_SEQERROR;
 665     }
 666     else
 667     {
 668         /* FIXME: we should replace xscanimage with our own UI */
 669         system ("xscanimage");
 670         pSource->currentState = 5;
 671         twRC = TWRC_SUCCESS;
 672         pSource->twCC = TWCC_SUCCESS;
 673     }
 674
 675     return twRC;
 676 }
 677
 678 /* DG_CONTROL/DAT_XFERGROUP/MSG_GET */
 679 TW_UINT16 TWAIN_XferGroupGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 680                               TW_MEMREF pData)
 681 {
 682     FIXME ("stub!\n");
 683
 684     return TWRC_FAILURE;
 685 }
 686
 687 /* DG_CONTROL/DAT_XFERGROUP/MSG_SET */
 688 TW_UINT16 TWAIN_XferGroupSet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 689                                   TW_MEMREF pData)
 690 {
 691     FIXME ("stub!\n");
 692
 693     return TWRC_FAILURE;
 694 }