dlls/twain_32/twain32_main.c

   1 /*
   2  * TWAIN32 functions
   3  *
   4  * Copyright 2000 Shi Quan He <shiquan@cyberdude.com>
   5  * Copyright 2006 Marcus Meissner
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "twain.h"
  27 #include "twain_i.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  31
  32 TW_UINT16 DSM_twCC;
  33 activeDS *activeSources;
  34 HINSTANCE DSM_hinstance;
  35
  36 BOOL WINAPI DllMain (HINSTANCE hinstance, DWORD reason, LPVOID reserved)
  37 {
  38     TRACE("%p,%x,%p\n", hinstance, reason, reserved);
  39
  40     switch (reason)
  41     {
  42         case DLL_PROCESS_ATTACH:
  43             DisableThreadLibraryCalls(hinstance);
  44             DSM_hinstance = hinstance;
  45             break;
  46         case DLL_PROCESS_DETACH:
  47             break;
  48     }
  49     return TRUE;
  50 }
  51
  52 /* A helper function that looks up a destination identity in the active
  53    source list */
  54 static activeDS *TWAIN_LookupSource (const TW_IDENTITY *pDest)
  55 {
  56     activeDS *pSource;
  57
  58     for (pSource = activeSources; pSource; pSource = pSource->next)
  59         if (pSource->identity.Id == pDest->Id)
  60             break;
  61     return pSource;
  62 }
  63
  64 static TW_UINT16 TWAIN_SourceManagerHandler (
  65            pTW_IDENTITY pOrigin,
  66            TW_UINT16   DAT,
  67            TW_UINT16   MSG,
  68            TW_MEMREF   pData)
  69 {
  70     TW_UINT16 twRC = TWRC_SUCCESS;
  71
  72     switch (DAT)
  73     {
  74         case DAT_IDENTITY:
  75             switch (MSG)
  76             {
  77                 case MSG_CLOSEDS:
  78                     twRC = TWAIN_CloseDS (pOrigin, pData);
  79                     break;
  80
  81                 case MSG_GETDEFAULT:
  82                     twRC = TWAIN_IdentityGetDefault (pOrigin, pData);
  83                     break;
  84
  85                 case MSG_GETFIRST:
  86                     twRC = TWAIN_IdentityGetFirst (pOrigin, pData);
  87                     break;
  88
  89                 case MSG_GETNEXT:
  90                     twRC = TWAIN_IdentityGetNext (pOrigin, pData);
  91                     break;
  92
  93                 case MSG_OPENDS:
  94                     twRC = TWAIN_OpenDS (pOrigin, pData);
  95                     break;
  96
  97                 case MSG_USERSELECT:
  98                     twRC = TWAIN_UserSelect (pOrigin, pData);
  99                     break;
 100
 101                 default:
 102                     /* Unrecognized operation triplet */
 103                     twRC = TWRC_FAILURE;
 104                     DSM_twCC = TWCC_BADPROTOCOL;
 105                     WARN("unrecognized operation triplet\n");
 106                     break;
 107             }
 108             break;
 109
 110         case DAT_PARENT:
 111             switch (MSG)
 112             {
 113                 case MSG_CLOSEDSM:
 114                     twRC = TWAIN_CloseDSM (pOrigin, pData);
 115                     break;
 116
 117                 case MSG_OPENDSM:
 118                     twRC = TWAIN_OpenDSM (pOrigin, pData);
 119                     break;
 120
 121                 default:
 122                     /* Unrecognized operation triplet */
 123                     twRC = TWRC_FAILURE;
 124                     DSM_twCC = TWCC_BADPROTOCOL;
 125                     WARN("unrecognized operation triplet\n");
 126             }
 127             break;
 128
 129         case DAT_STATUS:
 130             if (MSG == MSG_GET) {
 131                 twRC = TWAIN_GetDSMStatus (pOrigin, pData);
 132             } else {
 133                 twRC = TWRC_FAILURE;
 134                 DSM_twCC = TWCC_BADPROTOCOL;
 135                 WARN("unrecognized operation triplet\n");
 136             }
 137             break;
 138
 139         default:
 140             twRC = TWRC_FAILURE;
 141             DSM_twCC = TWCC_BADPROTOCOL;
 142             WARN("unrecognized operation triplet\n");
 143             break;
 144     }
 145
 146     return twRC;
 147 }
 148
 149
 150 /* Main entry point for the TWAIN library */
 151 TW_UINT16 WINAPI
 152 DSM_Entry (pTW_IDENTITY pOrigin,
 153            pTW_IDENTITY pDest,
 154            TW_UINT32    DG,
 155            TW_UINT16    DAT,
 156            TW_UINT16    MSG,
 157            TW_MEMREF    pData)
 158 {
 159     TW_UINT16 twRC = TWRC_SUCCESS;  /* Return Code */
 160
 161     TRACE("(DG=%d DAT=%d MSG=%d)\n", DG, DAT, MSG);
 162
 163     if (DG == DG_CONTROL && DAT == DAT_NULL)
 164     {
 165         activeDS *pSource = TWAIN_LookupSource (pOrigin);
 166         if (!pSource)
 167         {
 168             ERR("No source associated with pSource %p\n", pDest);
 169             DSM_twCC = TWCC_BADPROTOCOL;
 170             return TWRC_FAILURE;
 171         }
 172
 173         return TWAIN_ControlNull (pOrigin, pDest, pSource, MSG, pData);
 174     }
 175
 176     if (pDest)
 177     {
 178         activeDS *pSource = TWAIN_LookupSource (pDest);
 179         /* This operation's destination is a source */
 180
 181         if (!pSource) {
 182             ERR("No source associated with pDest %p\n", pDest);
 183             DSM_twCC = TWCC_BADDEST;
 184             return TWRC_FAILURE;
 185         }
 186
 187         if (DG == DG_CONTROL && DAT == DAT_EVENT && MSG == MSG_PROCESSEVENT)
 188         {
 189             twRC = TWAIN_ProcessEvent(pOrigin, pSource, pData);
 190             if (twRC == TWRC_DSEVENT)
 191                 return twRC;
 192         }
 193
 194         if (DG == DG_CONTROL && DAT == DAT_USERINTERFACE &&
 195             (MSG == MSG_ENABLEDS || MSG == MSG_ENABLEDSUIONLY) &&
 196             pData != NULL)
 197         {
 198             pSource->ui_window = ((TW_USERINTERFACE*)pData)->hParent;
 199         }
 200
 201         DSM_twCC = TWCC_SUCCESS;
 202         TRACE("Forwarding %d/%d/%d/%p to DS.\n", DG, DAT, MSG, pData);
 203         twRC = pSource->dsEntry(pOrigin, DG, DAT, MSG, pData);
 204         TRACE("return value is %d\n", twRC);
 205         return twRC;
 206     }
 207     switch (DG)
 208     {
 209         case DG_CONTROL:
 210             twRC = TWAIN_SourceManagerHandler (pOrigin, DAT, MSG, pData);
 211             break;
 212         default:
 213             FIXME("The DSM does not handle DG %d\n", DG);
 214             DSM_twCC = TWCC_BADPROTOCOL;
 215             twRC = TWRC_FAILURE;
 216     }
 217     return twRC;
 218 }