dlls/gphoto2.ds/capability.c

   1 /*
   2  * Copyright 2000 Corel Corporation
   3  * Copyright 2006 Marcus Meissner
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #define NONAMELESSUNION
  21 #define NONAMELESSSTRUCT
  22
  23 #include "config.h"
  24
  25 #include <stdarg.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "twain.h"
  30 #include "gphoto2_i.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  34
  35 static TW_UINT16 GPHOTO2_ICAPXferMech (pTW_CAPABILITY,TW_UINT16);
  36 static TW_UINT16 GPHOTO2_ICAPPixelType (pTW_CAPABILITY,TW_UINT16);
  37 static TW_UINT16 GPHOTO2_ICAPPixelFlavor (pTW_CAPABILITY,TW_UINT16);
  38 static TW_UINT16 GPHOTO2_ICAPBitDepth (pTW_CAPABILITY,TW_UINT16);
  39 static TW_UINT16 GPHOTO2_ICAPUnits (pTW_CAPABILITY,TW_UINT16);
  40
  41 TW_UINT16 GPHOTO2_SaneCapability (pTW_CAPABILITY pCapability, TW_UINT16 action)
  42 {
  43     TW_UINT16 twCC = TWCC_SUCCESS;
  44
  45     TRACE("capability=%d action=%d\n", pCapability->Cap, action);
  46
  47     switch (pCapability->Cap)
  48     {
  49         case CAP_DEVICEEVENT:
  50         case CAP_ALARMS:
  51         case CAP_ALARMVOLUME:
  52         case ACAP_AUDIOFILEFORMAT:
  53         case ACAP_XFERMECH:
  54         case ICAP_AUTOMATICBORDERDETECTION:
  55         case ICAP_AUTOMATICDESKEW:
  56         case ICAP_AUTODISCARDBLANKPAGES:
  57         case ICAP_AUTOMATICROTATE:
  58         case ICAP_FLIPROTATION:
  59         case CAP_AUTOMATICCAPTURE:
  60         case CAP_TIMEBEFOREFIRSTCAPTURE:
  61         case CAP_TIMEBETWEENCAPTURES:
  62         case CAP_AUTOSCAN:
  63         case CAP_CLEARBUFFERS:
  64         case CAP_MAXBATCHBUFFERS:
  65         case ICAP_BARCODEDETECTIONENABLED:
  66         case ICAP_SUPPORTEDBARCODETYPES:
  67         case ICAP_BARCODEMAXSEARCHPRIORITIES:
  68         case ICAP_BARCODESEARCHPRIORITIES:
  69         case ICAP_BARCODESEARCHMODE:
  70         case ICAP_BARCODEMAXRETRIES:
  71         case ICAP_BARCODETIMEOUT:
  72         case CAP_EXTENDEDCAPS:
  73         case CAP_SUPPORTEDCAPS:
  74         case ICAP_FILTER:
  75         case ICAP_GAMMA:
  76         case ICAP_PLANARCHUNKY:
  77         case ICAP_BITORDERCODES:
  78         case ICAP_CCITTKFACTOR:
  79         case ICAP_JPEGPIXELTYPE:
  80         /*case ICAP_JPEGQUALITY:*/
  81         case ICAP_PIXELFLAVORCODES:
  82         case ICAP_TIMEFILL:
  83         case CAP_DEVICEONLINE:
  84         case CAP_DEVICETIMEDATE:
  85         case CAP_SERIALNUMBER:
  86         case ICAP_EXPOSURETIME:
  87         case ICAP_FLASHUSED2:
  88         case ICAP_IMAGEFILTER:
  89         case ICAP_LAMPSTATE:
  90         case ICAP_LIGHTPATH:
  91         case ICAP_NOISEFILTER:
  92         case ICAP_OVERSCAN:
  93         case ICAP_PHYSICALHEIGHT:
  94         case ICAP_PHYSICALWIDTH:
  95         case ICAP_ZOOMFACTOR:
  96         case CAP_PRINTER:
  97         case CAP_PRINTERENABLED:
  98         case CAP_PRINTERINDEX:
  99         case CAP_PRINTERMODE:
 100         case CAP_PRINTERSTRING:
 101         case CAP_PRINTERSUFFIX:
 102         case CAP_AUTHOR:
 103         case CAP_CAPTION:
 104         case CAP_TIMEDATE:
 105         case ICAP_AUTOBRIGHT:
 106         case ICAP_BRIGHTNESS:
 107         case ICAP_CONTRAST:
 108         case ICAP_HIGHLIGHT:
 109         case ICAP_ORIENTATION:
 110         case ICAP_ROTATION:
 111         case ICAP_SHADOW:
 112         case ICAP_XSCALING:
 113         case ICAP_YSCALING:
 114         case ICAP_BITDEPTHREDUCTION:
 115         case ICAP_BITORDER:
 116         case ICAP_CUSTHALFTONE:
 117         case ICAP_HALFTONES:
 118         case ICAP_THRESHOLD:
 119         case CAP_LANGUAGE:
 120         case ICAP_FRAMES:
 121         case ICAP_MAXFRAMES:
 122         case ICAP_SUPPORTEDSIZES:
 123         case CAP_AUTOFEED:
 124         case CAP_CLEARPAGE:
 125         case CAP_FEEDERALIGNMENT:
 126         case CAP_FEEDERENABLED:
 127         case CAP_FEEDERLOADED:
 128         case CAP_FEEDERORDER:
 129         case CAP_FEEDPAGE:
 130         case CAP_PAPERBINDING:
 131         case CAP_PAPERDETECTABLE:
 132         case CAP_REACQUIREALLOWED:
 133         case CAP_REWINDPAGE:
 134         case ICAP_PATCHCODEDETECTIONENABLED:
 135         case ICAP_SUPPORTEDPATCHCODETYPES:
 136         case ICAP_PATCHCODEMAXSEARCHPRIORITIES:
 137         case ICAP_PATCHCODESEARCHPRIORITIES:
 138         case ICAP_PATCHCODESEARCHMODE:
 139         case ICAP_PATCHCODEMAXRETRIES:
 140         case ICAP_PATCHCODETIMEOUT:
 141         case CAP_BATTERYMINUTES:
 142         case CAP_BATTERYPERCENTAGE:
 143         case CAP_POWERDOWNTIME:
 144         case CAP_POWERSUPPLY:
 145         case ICAP_XNATIVERESOLUTION:
 146         case ICAP_XRESOLUTION:
 147         case ICAP_YNATIVERESOLUTION:
 148         case ICAP_YRESOLUTION:
 149             twCC = TWCC_CAPUNSUPPORTED;
 150             break;
 151         case CAP_XFERCOUNT:
 152             /* This is a required capability that every source need to
 153                support but we haven't implemented yet. */
 154             twCC = TWCC_SUCCESS;
 155             break;
 156         /*case ICAP_COMPRESSION:*/
 157         case ICAP_IMAGEFILEFORMAT:
 158         case ICAP_TILES:
 159             twCC = TWCC_CAPUNSUPPORTED;
 160             break;
 161         case ICAP_XFERMECH:
 162             twCC = GPHOTO2_ICAPXferMech (pCapability, action);
 163             break;
 164         case ICAP_PIXELTYPE:
 165             twCC = GPHOTO2_ICAPPixelType (pCapability, action);
 166             break;
 167         case ICAP_PIXELFLAVOR:
 168             twCC = GPHOTO2_ICAPPixelFlavor (pCapability, action);
 169             break;
 170         case ICAP_BITDEPTH:
 171             twCC = GPHOTO2_ICAPBitDepth (pCapability, action);
 172             break;
 173         case ICAP_UNITS:
 174             twCC = GPHOTO2_ICAPUnits (pCapability, action);
 175             break;
 176         case ICAP_UNDEFINEDIMAGESIZE:
 177         case CAP_CAMERAPREVIEWUI:
 178         case CAP_ENABLEDSUIONLY:
 179         case CAP_INDICATORS:
 180         case CAP_UICONTROLLABLE:
 181             twCC = TWCC_CAPUNSUPPORTED;
 182             break;
 183
 184         case ICAP_COMPRESSION:
 185             twCC = TWCC_SUCCESS;
 186             break;
 187         default:
 188             twCC = TWRC_FAILURE;
 189             break;
 190     }
 191     return twCC;
 192 }
 193
 194 static TW_BOOL GPHOTO2_OneValueSet32 (pTW_CAPABILITY pCapability, TW_UINT32 value)
 195 {
 196     pCapability->hContainer = (TW_HANDLE)GlobalAlloc (0, sizeof(TW_ONEVALUE));
 197
 198     TRACE("-> %ld\n", value);
 199
 200     if (pCapability->hContainer)
 201     {
 202         pTW_ONEVALUE pVal = GlobalLock ((HGLOBAL) pCapability->hContainer);
 203         pVal->ItemType = TWTY_UINT32;
 204         pVal->Item = value;
 205         GlobalUnlock ((HGLOBAL) pCapability->hContainer);
 206         pCapability->ConType = TWON_ONEVALUE;
 207         return TRUE;
 208     }
 209     else
 210         return FALSE;
 211 }
 212
 213 static TW_BOOL GPHOTO2_OneValueSet16 (pTW_CAPABILITY pCapability, TW_UINT16 value)
 214 {
 215     pCapability->hContainer = (TW_HANDLE)GlobalAlloc (0, sizeof(TW_ONEVALUE));
 216
 217     TRACE("-> %d\n", value);
 218
 219     if (pCapability->hContainer)
 220     {
 221         pTW_ONEVALUE pVal = GlobalLock ((HGLOBAL) pCapability->hContainer);
 222         pVal->ItemType = TWTY_UINT16;
 223         pVal->Item = value;
 224         GlobalUnlock ((HGLOBAL) pCapability->hContainer);
 225         pCapability->ConType = TWON_ONEVALUE;
 226         return TRUE;
 227     }
 228     else
 229         return FALSE;
 230 }
 231
 232 static TW_BOOL GPHOTO2_EnumSet16 (pTW_CAPABILITY pCapability, int nrofvalues, TW_UINT16 *values, int current, int def)
 233 {
 234     pTW_ENUMERATION pVal;
 235     pCapability->hContainer = (TW_HANDLE)GlobalAlloc (0, sizeof(TW_ENUMERATION) + nrofvalues * sizeof(TW_UINT16));
 236
 237     if (!pCapability->hContainer)
 238         return FALSE;
 239
 240     pVal = GlobalLock ((HGLOBAL) pCapability->hContainer);
 241     pVal->ItemType = TWTY_UINT16;
 242     pVal->NumItems = nrofvalues;
 243     memcpy(pVal->ItemList, values, sizeof(TW_UINT16)*nrofvalues);
 244     pVal->CurrentIndex = current;
 245     pVal->DefaultIndex = def;
 246     pCapability->ConType = TWON_ENUMERATION;
 247     GlobalUnlock ((HGLOBAL) pCapability->hContainer);
 248     return TRUE;
 249 }
 250
 251 static TW_BOOL GPHOTO2_EnumGet16 (pTW_CAPABILITY pCapability, int *nrofvalues, TW_UINT16 **values)
 252 {
 253     pTW_ENUMERATION pVal = GlobalLock ((HGLOBAL) pCapability->hContainer);
 254
 255     if (!pVal)
 256         return FALSE;
 257     *nrofvalues = pVal->NumItems;
 258     *values = HeapAlloc( GetProcessHeap(), 0, sizeof(TW_UINT16)*pVal->NumItems);
 259     memcpy (*values, pVal->ItemList, sizeof(TW_UINT16)*(*nrofvalues));
 260     FIXME("Current Index %ld, Default Index %ld\n", pVal->CurrentIndex, pVal->DefaultIndex);
 261     GlobalUnlock ((HGLOBAL) pCapability->hContainer);
 262     return TRUE;
 263 }
 264
 265 static TW_BOOL GPHOTO2_OneValueGet32 (pTW_CAPABILITY pCapability, TW_UINT32 *pValue)
 266 {
 267     pTW_ONEVALUE pVal = GlobalLock ((HGLOBAL) pCapability->hContainer);
 268
 269     if (pVal)
 270     {
 271         *pValue = pVal->Item;
 272         GlobalUnlock ((HGLOBAL) pCapability->hContainer);
 273         return TRUE;
 274     }
 275     else
 276         return FALSE;
 277 }
 278
 279 static TW_BOOL GPHOTO2_OneValueGet16 (pTW_CAPABILITY pCapability, TW_UINT16 *pValue)
 280 {
 281     pTW_ONEVALUE pVal = GlobalLock ((HGLOBAL) pCapability->hContainer);
 282
 283     if (pVal)
 284     {
 285         *pValue = pVal->Item;
 286         GlobalUnlock ((HGLOBAL) pCapability->hContainer);
 287         return TRUE;
 288     }
 289     else
 290         return FALSE;
 291 }
 292
 293 /* ICAP_XFERMECH */
 294 static TW_UINT16 GPHOTO2_ICAPXferMech (pTW_CAPABILITY pCapability, TW_UINT16 action)
 295 {
 296     TRACE("ICAP_XFERMECH, action %d\n", action);
 297
 298     switch (action)
 299     {
 300         case MSG_GET:
 301             if (!GPHOTO2_OneValueSet32 (pCapability, activeDS.capXferMech))
 302                 return TWCC_LOWMEMORY;
 303             return TWCC_SUCCESS;
 304         case MSG_SET:
 305             if (pCapability->ConType == TWON_ONEVALUE)
 306             {
 307                 TW_UINT32 xfermechtemp = 0;
 308
 309                 if (!GPHOTO2_OneValueGet32 (pCapability, &xfermechtemp))
 310                     return TWCC_LOWMEMORY;
 311                 activeDS.capXferMech = xfermechtemp;
 312                 TRACE("xfermech is %ld\n", xfermechtemp);
 313                 return TWCC_SUCCESS;
 314             }
 315             else if (pCapability->ConType == TWON_ENUMERATION)
 316             {
 317
 318             }
 319             FIXME("GET FAILED\n");
 320             break;
 321         case MSG_GETCURRENT:
 322             if (!GPHOTO2_OneValueSet32 (pCapability, activeDS.capXferMech))
 323                 return TWCC_LOWMEMORY;
 324             break;
 325         case MSG_GETDEFAULT:
 326             if (!GPHOTO2_OneValueSet32 (pCapability, TWSX_NATIVE))
 327                 return TWCC_LOWMEMORY;
 328             break;
 329         case MSG_RESET:
 330             activeDS.capXferMech = TWSX_NATIVE;
 331             break;
 332     }
 333     return TWCC_SUCCESS;
 334 }
 335
 336 /* ICAP_PIXELTYPE */
 337 static TW_UINT16 GPHOTO2_ICAPPixelType (pTW_CAPABILITY pCapability, TW_UINT16 action)
 338 {
 339     TRACE("Action %d\n", action);
 340
 341     switch (action)
 342     {
 343         case MSG_GET:
 344             if ((pCapability->ConType == TWON_DONTCARE16) ||
 345                 (pCapability->ConType == TWON_ONEVALUE)
 346             ) {
 347                 if (!GPHOTO2_OneValueSet16 (pCapability, activeDS.pixeltype))
 348                     return TWCC_LOWMEMORY;
 349                 return TWCC_SUCCESS;
 350             }
 351             FIXME("Unknown container type %x in MSG_GET\n", pCapability->ConType);
 352             return TWCC_CAPBADOPERATION;
 353         case MSG_SET:
 354             if (pCapability->ConType == TWON_ONEVALUE)
 355             {
 356                 TW_UINT16 pixeltype = 0;
 357
 358                 if (!GPHOTO2_OneValueGet16 (pCapability, &pixeltype))
 359                     return TWCC_LOWMEMORY;
 360                 activeDS.pixeltype = pixeltype;
 361                 FIXME("pixeltype changed to %d!\n", pixeltype);
 362                 return TWCC_SUCCESS;
 363             }
 364             FIXME("set not done\n");
 365             if (pCapability->ConType == TWON_ENUMERATION) {
 366                 TW_UINT16       *values = NULL;
 367                 int i, nrofvalues = 0;
 368
 369                 if (!GPHOTO2_EnumGet16 (pCapability, &nrofvalues, &values))
 370                     return TWCC_LOWMEMORY;
 371                 for (i=0;i<nrofvalues;i++)
 372                     FIXME("SET PixelType %d:%d\n", i, values[i]);
 373                 HeapFree (GetProcessHeap(), 0, values);
 374             }
 375             break;
 376         case MSG_GETCURRENT:
 377             if (!GPHOTO2_OneValueSet16 (pCapability, activeDS.pixeltype)) {
 378                 FIXME("Failed one value set in GETCURRENT, contype %d!\n", pCapability->ConType);
 379                 return TWCC_LOWMEMORY;
 380             }
 381             break;
 382         case MSG_GETDEFAULT:
 383             if (!GPHOTO2_OneValueSet16 (pCapability, TWPT_RGB)) {
 384                 FIXME("Failed onevalue set in GETDEFAULT!\n");
 385                 return TWCC_LOWMEMORY;
 386             }
 387             break;
 388         case MSG_RESET:
 389             activeDS.pixeltype = TWPT_RGB;
 390             break;
 391     }
 392     return TWCC_SUCCESS;
 393 }
 394
 395 /* ICAP_PIXELFLAVOR */
 396 static TW_UINT16 GPHOTO2_ICAPPixelFlavor (pTW_CAPABILITY pCapability, TW_UINT16 action)
 397 {
 398     TRACE("Action %d\n", action);
 399
 400     switch (action)
 401     {
 402         case MSG_GET:
 403             if ((pCapability->ConType == TWON_DONTCARE16)       ||
 404                 (pCapability->ConType == TWON_ONEVALUE)
 405             ) {
 406                 if (!GPHOTO2_OneValueSet16 (pCapability, TWPF_CHOCOLATE))
 407                     return TWCC_LOWMEMORY;
 408                 return TWCC_SUCCESS;
 409             }
 410             if (!pCapability->ConType) {
 411                 TW_UINT16 arr[2];
 412                 arr[0] = TWPF_CHOCOLATE;
 413                 arr[1] = TWPF_VANILLA;
 414
 415                 if (!GPHOTO2_EnumSet16 (pCapability, 2, arr, 1, 1))
 416                     return TWCC_LOWMEMORY;
 417                 return TWCC_SUCCESS;
 418             }
 419             FIXME("MSG_GET container type %x unhandled\n", pCapability->ConType);
 420             return TWCC_BADVALUE;
 421         case MSG_SET:
 422             if (pCapability->ConType == TWON_ONEVALUE)
 423             {
 424                 TW_UINT16 pixelflavor = 0;
 425
 426                 if (!GPHOTO2_OneValueGet16 (pCapability, &pixelflavor))
 427                     return TWCC_LOWMEMORY;
 428                 activeDS.pixelflavor = pixelflavor;
 429                 FIXME("pixelflavor is %d\n", pixelflavor);
 430             }
 431             break;
 432         case MSG_GETCURRENT:
 433             if (!GPHOTO2_OneValueSet16 (pCapability, activeDS.pixelflavor))
 434                 return TWCC_LOWMEMORY;
 435             break;
 436         case MSG_GETDEFAULT:
 437             if (!GPHOTO2_OneValueSet16 (pCapability, TWPF_CHOCOLATE))
 438                 return TWCC_LOWMEMORY;
 439             break;
 440         case MSG_RESET:
 441             break;
 442     }
 443     return TWCC_SUCCESS;
 444 }
 445
 446 /* ICAP_BITDEPTH */
 447 static TW_UINT16 GPHOTO2_ICAPBitDepth (pTW_CAPABILITY pCapability, TW_UINT16 action)
 448 {
 449     TRACE("Action %d\n", action);
 450
 451     switch (action)
 452     {
 453         case MSG_GET:
 454             if ((pCapability->ConType == TWON_DONTCARE16) ||
 455                 (pCapability->ConType == TWON_ONEVALUE)
 456             ) {
 457                 if (!GPHOTO2_OneValueSet16 (pCapability, 24))
 458                     return TWCC_LOWMEMORY;
 459                 return TWCC_SUCCESS;
 460             }
 461             FIXME("MSG_GET container type %x unhandled\n", pCapability->ConType);
 462             return TWCC_SUCCESS;
 463         case MSG_SET:
 464             if (pCapability->ConType == TWON_ONEVALUE) {
 465                 TW_UINT16 bitdepth = 0;
 466
 467                 if (!GPHOTO2_OneValueGet16 (pCapability, &bitdepth))
 468                     return TWCC_LOWMEMORY;
 469                 if (bitdepth != 24)
 470                     return TWCC_BADVALUE;
 471                 return TWCC_SUCCESS;
 472             }
 473             if (pCapability->ConType == TWON_ENUMERATION)
 474             {
 475                 int i, nrofvalues = 0;
 476                 TW_UINT16 *values = NULL;
 477
 478                 if (!GPHOTO2_EnumGet16 (pCapability, &nrofvalues, &values))
 479                     return TWCC_LOWMEMORY;
 480                 for (i=0;i<nrofvalues;i++)
 481                     FIXME("SET: enum element %d = %d\n", i, values[i]);
 482                 HeapFree (GetProcessHeap(), 0, values);
 483                 return TWCC_SUCCESS;
 484             }
 485             FIXME("Unhandled container type %d in MSG_SET\n", pCapability->ConType);
 486             break;
 487         case MSG_GETCURRENT:
 488             if (!GPHOTO2_OneValueSet16 (pCapability, 24))
 489                 return TWCC_LOWMEMORY;
 490             break;
 491         case MSG_GETDEFAULT:
 492             if (!GPHOTO2_OneValueSet16 (pCapability, 24))
 493                 return TWCC_LOWMEMORY;
 494             break;
 495         case MSG_RESET:
 496             break;
 497     }
 498     return TWCC_SUCCESS;
 499 }
 500
 501 /* ICAP_UNITS */
 502 static TW_UINT16 GPHOTO2_ICAPUnits (pTW_CAPABILITY pCapability, TW_UINT16 action)
 503 {
 504     TRACE("Action %d\n", action);
 505
 506     switch (action)
 507     {
 508         case MSG_GET:
 509             if ((pCapability->ConType == TWON_DONTCARE16) ||
 510                 (pCapability->ConType == TWON_ONEVALUE)
 511             ) {
 512                 if (!GPHOTO2_OneValueSet16 (pCapability, TWUN_PIXELS))
 513                     return TWCC_LOWMEMORY;
 514                 return TWCC_SUCCESS;
 515             }
 516             FIXME("MSG_GET container type %x unhandled\n", pCapability->ConType);
 517             return TWCC_SUCCESS;
 518         case MSG_SET:
 519             if (pCapability->ConType == TWON_ONEVALUE) {
 520                 TW_UINT16 units = 0;
 521
 522                 if (!GPHOTO2_OneValueGet16 (pCapability, &units))
 523                     return TWCC_LOWMEMORY;
 524                 FIXME("SET to type %d, stub.\n", units);
 525                 return TWCC_SUCCESS;
 526             }
 527             if (pCapability->ConType == TWON_ENUMERATION)
 528             {
 529                 int i, nrofvalues = 0;
 530                 TW_UINT16 *values = NULL;
 531
 532                 if (!GPHOTO2_EnumGet16 (pCapability, &nrofvalues, &values))
 533                     return TWCC_LOWMEMORY;
 534                 for (i=0;i<nrofvalues;i++)
 535                     FIXME("SET: enum element %d = %d\n", i, values[i]);
 536                 HeapFree (GetProcessHeap(), 0, values);
 537                 return TWCC_SUCCESS;
 538             }
 539             FIXME("Unhandled container type %d in MSG_SET\n", pCapability->ConType);
 540             break;
 541         case MSG_GETCURRENT:
 542             if (!GPHOTO2_OneValueSet16 (pCapability, TWUN_INCHES))
 543                 return TWCC_LOWMEMORY;
 544             break;
 545         case MSG_GETDEFAULT:
 546             if (!GPHOTO2_OneValueSet16 (pCapability, TWUN_PIXELS))
 547                 return TWCC_LOWMEMORY;
 548             break;
 549         case MSG_RESET:
 550             break;
 551     }
 552     return TWCC_SUCCESS;
 553 }