dlls/sane.ds/capability.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #define NONAMELESSUNION
  20 #define NONAMELESSSTRUCT
  21
  22 #include "config.h"
  23
  24 #include <stdarg.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "twain.h"
  29 #include "sane_i.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  33
  34 static TW_UINT16 get_onevalue(pTW_CAPABILITY pCapability, TW_UINT16 *type, TW_UINT32 *value)
  35 {
  36     if (pCapability->hContainer)
  37     {
  38         pTW_ONEVALUE pVal = GlobalLock (pCapability->hContainer);
  39         if (pVal)
  40         {
  41             *value = pVal->Item;
  42             if (type)
  43                 *type = pVal->ItemType;
  44             GlobalUnlock (pCapability->hContainer);
  45             return TWCC_SUCCESS;
  46         }
  47     }
  48     return TWCC_BUMMER;
  49 }
  50
  51
  52 static TW_UINT16 set_onevalue(pTW_CAPABILITY pCapability, TW_UINT16 type, TW_UINT32 value)
  53 {
  54     pCapability->hContainer = GlobalAlloc (0, sizeof(TW_ONEVALUE));
  55
  56     if (pCapability->hContainer)
  57     {
  58         pTW_ONEVALUE pVal = GlobalLock (pCapability->hContainer);
  59         if (pVal)
  60         {
  61             pCapability->ConType = TWON_ONEVALUE;
  62             pVal->ItemType = type;
  63             pVal->Item = value;
  64             GlobalUnlock (pCapability->hContainer);
  65             return TWCC_SUCCESS;
  66         }
  67     }
  68    return TWCC_LOWMEMORY;
  69 }
  70
  71 static TW_UINT16 msg_set(pTW_CAPABILITY pCapability, TW_UINT32 *val)
  72 {
  73     if (pCapability->ConType == TWON_ONEVALUE)
  74         return get_onevalue(pCapability, NULL, val);
  75
  76     FIXME("Partial Stub:  MSG_SET only supports TW_ONEVALUE\n");
  77     return TWCC_BADCAP;
  78 }
  79
  80
  81 static TW_UINT16 msg_get_enum(pTW_CAPABILITY pCapability, const TW_UINT32 *values, int value_count,
  82                               TW_UINT16 type, TW_UINT32 current, TW_UINT32 default_value)
  83 {
  84     TW_ENUMERATION *enumv = NULL;
  85     TW_UINT32 *p32;
  86     TW_UINT16 *p16;
  87     int i;
  88
  89     pCapability->ConType = TWON_ENUMERATION;
  90     pCapability->hContainer = 0;
  91
  92     if (type == TWTY_INT16 || type == TWTY_UINT16)
  93         pCapability->hContainer = GlobalAlloc (0, FIELD_OFFSET( TW_ENUMERATION, ItemList[value_count * sizeof(TW_UINT16)]));
  94
  95     if (type == TWTY_INT32 || type == TWTY_UINT32)
  96         pCapability->hContainer = GlobalAlloc (0, FIELD_OFFSET( TW_ENUMERATION, ItemList[value_count * sizeof(TW_UINT32)]));
  97
  98     if (pCapability->hContainer)
  99         enumv = GlobalLock(pCapability->hContainer);
 100
 101     if (! enumv)
 102         return TWCC_LOWMEMORY;
 103
 104     enumv->ItemType = type;
 105     enumv->NumItems = value_count;
 106
 107     p16 = (TW_UINT16 *) enumv->ItemList;
 108     p32 = (TW_UINT32 *) enumv->ItemList;
 109     for (i = 0; i < value_count; i++)
 110     {
 111         if (values[i] == current)
 112             enumv->CurrentIndex = i;
 113         if (values[i] == default_value)
 114             enumv->DefaultIndex = i;
 115         if (type == TWTY_INT16 || type == TWTY_UINT16)
 116             p16[i] = values[i];
 117         if (type == TWTY_INT32 || type == TWTY_UINT32)
 118             p32[i] = values[i];
 119     }
 120
 121     GlobalUnlock(pCapability->hContainer);
 122     return TWCC_SUCCESS;
 123 }
 124
 125 #ifdef SONAME_LIBSANE
 126 static TW_UINT16 msg_get_range(pTW_CAPABILITY pCapability, TW_UINT16 type,
 127             TW_UINT32 minval, TW_UINT32 maxval, TW_UINT32 step, TW_UINT32 def,  TW_UINT32 current)
 128 {
 129     TW_RANGE *range = NULL;
 130
 131     pCapability->ConType = TWON_RANGE;
 132     pCapability->hContainer = 0;
 133
 134     pCapability->hContainer = GlobalAlloc (0, sizeof(*range));
 135     if (pCapability->hContainer)
 136         range = GlobalLock(pCapability->hContainer);
 137
 138     if (! range)
 139         return TWCC_LOWMEMORY;
 140
 141     range->ItemType = type;
 142     range->MinValue = minval;
 143     range->MaxValue = maxval;
 144     range->StepSize = step;
 145     range->DefaultValue = def;
 146     range->CurrentValue = current;
 147
 148     GlobalUnlock(pCapability->hContainer);
 149     return TWCC_SUCCESS;
 150 }
 151 #endif
 152
 153 static TW_UINT16 TWAIN_GetSupportedCaps(pTW_CAPABILITY pCapability)
 154 {
 155     TW_ARRAY *a;
 156     static const UINT16 supported_caps[] = { CAP_SUPPORTEDCAPS, CAP_XFERCOUNT, CAP_UICONTROLLABLE,
 157                     ICAP_XFERMECH, ICAP_PIXELTYPE, ICAP_UNITS, ICAP_BITDEPTH, ICAP_COMPRESSION, ICAP_PIXELFLAVOR,
 158                     ICAP_XRESOLUTION, ICAP_YRESOLUTION };
 159
 160     pCapability->hContainer = GlobalAlloc (0, FIELD_OFFSET( TW_ARRAY, ItemList[sizeof(supported_caps)] ));
 161     pCapability->ConType = TWON_ARRAY;
 162
 163     if (pCapability->hContainer)
 164     {
 165         UINT16 *u;
 166         int i;
 167         a = GlobalLock (pCapability->hContainer);
 168         a->ItemType = TWTY_UINT16;
 169         a->NumItems = sizeof(supported_caps) / sizeof(supported_caps[0]);
 170         u = (UINT16 *) a->ItemList;
 171         for (i = 0; i < a->NumItems; i++)
 172             u[i] = supported_caps[i];
 173         GlobalUnlock (pCapability->hContainer);
 174         return TWCC_SUCCESS;
 175     }
 176     else
 177         return TWCC_LOWMEMORY;
 178 }
 179
 180
 181 /* ICAP_XFERMECH */
 182 static TW_UINT16 SANE_ICAPXferMech (pTW_CAPABILITY pCapability, TW_UINT16 action)
 183 {
 184     static const TW_UINT32 possible_values[] = { TWSX_NATIVE, TWSX_MEMORY };
 185     TW_UINT32 val;
 186     TW_UINT16 twCC = TWCC_BADCAP;
 187
 188     TRACE("ICAP_XFERMECH\n");
 189
 190     switch (action)
 191     {
 192         case MSG_QUERYSUPPORT:
 193             twCC = set_onevalue(pCapability, TWTY_INT32,
 194                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 195             break;
 196
 197         case MSG_GET:
 198             twCC = msg_get_enum(pCapability, possible_values, sizeof(possible_values) / sizeof(possible_values[0]),
 199                     TWTY_UINT16, activeDS.capXferMech, TWSX_NATIVE);
 200             break;
 201
 202         case MSG_SET:
 203             twCC = msg_set(pCapability, &val);
 204             if (twCC == TWCC_SUCCESS)
 205             {
 206                activeDS.capXferMech = (TW_UINT16) val;
 207                FIXME("Partial Stub:  XFERMECH set to %d, but ignored\n", val);
 208             }
 209             break;
 210
 211         case MSG_GETDEFAULT:
 212             twCC = set_onevalue(pCapability, TWTY_UINT16, TWSX_NATIVE);
 213             break;
 214
 215         case MSG_RESET:
 216             activeDS.capXferMech = TWSX_NATIVE;
 217             /* .. fall through intentional .. */
 218
 219         case MSG_GETCURRENT:
 220             twCC = set_onevalue(pCapability, TWTY_UINT16, activeDS.capXferMech);
 221             FIXME("Partial Stub:  XFERMECH of %d not actually used\n", activeDS.capXferMech);
 222             break;
 223     }
 224     return twCC;
 225 }
 226
 227
 228 /* CAP_XFERCOUNT */
 229 static TW_UINT16 SANE_CAPXferCount (pTW_CAPABILITY pCapability, TW_UINT16 action)
 230 {
 231     TW_UINT32 val;
 232     TW_UINT16 twCC = TWCC_BADCAP;
 233
 234     TRACE("CAP_XFERCOUNT\n");
 235
 236     switch (action)
 237     {
 238         case MSG_QUERYSUPPORT:
 239             twCC = set_onevalue(pCapability, TWTY_INT32,
 240                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 241             break;
 242
 243         case MSG_GET:
 244             twCC = set_onevalue(pCapability, TWTY_INT16, -1);
 245             FIXME("Partial Stub:  Reporting only support for transfer all\n");
 246             break;
 247
 248         case MSG_SET:
 249             twCC = msg_set(pCapability, &val);
 250             if (twCC == TWCC_SUCCESS)
 251                FIXME("Partial Stub:  XFERCOUNT set to %d, but ignored\n", val);
 252             break;
 253
 254         case MSG_GETDEFAULT:
 255             twCC = set_onevalue(pCapability, TWTY_INT16, -1);
 256             break;
 257
 258         case MSG_RESET:
 259             /* .. fall through intentional .. */
 260
 261         case MSG_GETCURRENT:
 262             twCC = set_onevalue(pCapability, TWTY_INT16, -1);
 263             break;
 264     }
 265     return twCC;
 266 }
 267
 268 #ifdef SONAME_LIBSANE
 269 static BOOL pixeltype_to_sane_mode(TW_UINT16 pixeltype, SANE_String mode, int len)
 270 {
 271     SANE_String_Const m = NULL;
 272     switch (pixeltype)
 273     {
 274         case TWPT_GRAY:
 275             m = SANE_VALUE_SCAN_MODE_GRAY;
 276             break;
 277         case TWPT_RGB:
 278             m = SANE_VALUE_SCAN_MODE_COLOR;
 279             break;
 280         case TWPT_BW:
 281             m = SANE_VALUE_SCAN_MODE_LINEART;
 282             break;
 283     }
 284     if (! m)
 285         return FALSE;
 286     if (strlen(m) >= len)
 287         return FALSE;
 288     strcpy(mode, m);
 289     return TRUE;
 290 }
 291 static BOOL sane_mode_to_pixeltype(SANE_String_Const mode, TW_UINT16 *pixeltype)
 292 {
 293     if (strcmp(mode, SANE_VALUE_SCAN_MODE_LINEART) == 0)
 294         *pixeltype = TWPT_BW;
 295     else if (memcmp(mode, SANE_VALUE_SCAN_MODE_GRAY, strlen(SANE_VALUE_SCAN_MODE_GRAY)) == 0)
 296         *pixeltype = TWPT_GRAY;
 297     else if (strcmp(mode, SANE_VALUE_SCAN_MODE_COLOR) == 0)
 298         *pixeltype = TWPT_RGB;
 299     else
 300         return FALSE;
 301
 302     return TRUE;
 303 }
 304
 305 static TW_UINT16 sane_status_to_twcc(SANE_Status rc)
 306 {
 307     switch (rc)
 308     {
 309         case SANE_STATUS_GOOD:
 310             return TWCC_SUCCESS;
 311         case SANE_STATUS_UNSUPPORTED:
 312             return TWCC_CAPUNSUPPORTED;
 313         case SANE_STATUS_JAMMED:
 314             return TWCC_PAPERJAM;
 315         case SANE_STATUS_NO_MEM:
 316             return TWCC_LOWMEMORY;
 317         case SANE_STATUS_ACCESS_DENIED:
 318             return TWCC_DENIED;
 319
 320         case SANE_STATUS_IO_ERROR:
 321         case SANE_STATUS_NO_DOCS:
 322         case SANE_STATUS_COVER_OPEN:
 323         case SANE_STATUS_EOF:
 324         case SANE_STATUS_INVAL:
 325         case SANE_STATUS_CANCELLED:
 326         case SANE_STATUS_DEVICE_BUSY:
 327         default:
 328             return TWCC_BUMMER;
 329     }
 330 }
 331 #endif
 332
 333 /* ICAP_PIXELTYPE */
 334 static TW_UINT16 SANE_ICAPPixelType (pTW_CAPABILITY pCapability, TW_UINT16 action)
 335 {
 336     TW_UINT16 twCC = TWCC_BADCAP;
 337 #ifdef SONAME_LIBSANE
 338     TW_UINT32 possible_values[3];
 339     int possible_value_count;
 340     TW_UINT32 val;
 341     SANE_Status rc;
 342     SANE_Int status;
 343     SANE_String_Const *choices;
 344     char current_mode[64];
 345     TW_UINT16 current_pixeltype = TWPT_BW;
 346     SANE_Char mode[64];
 347
 348     TRACE("ICAP_PIXELTYPE\n");
 349
 350     rc = sane_option_probe_mode(activeDS.deviceHandle, &choices, current_mode, sizeof(current_mode));
 351     if (rc != SANE_STATUS_GOOD)
 352     {
 353         ERR("Unable to retrieve mode from sane, ICAP_PIXELTYPE unsupported\n");
 354         return twCC;
 355     }
 356
 357     sane_mode_to_pixeltype(current_mode, &current_pixeltype);
 358
 359     /* Sane does not support a concept of a default mode, so we simply cache
 360      *   the first mode we find */
 361     if (! activeDS.PixelTypeSet)
 362     {
 363         activeDS.PixelTypeSet = TRUE;
 364         activeDS.defaultPixelType = current_pixeltype;
 365     }
 366
 367     switch (action)
 368     {
 369         case MSG_QUERYSUPPORT:
 370             twCC = set_onevalue(pCapability, TWTY_INT32,
 371                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 372             break;
 373
 374         case MSG_GET:
 375             for (possible_value_count = 0; choices && *choices && possible_value_count < 3; choices++)
 376             {
 377                 TW_UINT16 pix;
 378                 if (sane_mode_to_pixeltype(*choices, &pix))
 379                     possible_values[possible_value_count++] = pix;
 380             }
 381             twCC = msg_get_enum(pCapability, possible_values, possible_value_count,
 382                     TWTY_UINT16, current_pixeltype, activeDS.defaultPixelType);
 383             break;
 384
 385         case MSG_SET:
 386             twCC = msg_set(pCapability, &val);
 387             if (twCC == TWCC_SUCCESS)
 388             {
 389                 if (! pixeltype_to_sane_mode(val, mode, sizeof(mode)))
 390                     return TWCC_BADVALUE;
 391
 392                 status = 0;
 393                 rc = sane_option_set_str(activeDS.deviceHandle, "mode", mode, &status);
 394                 /* Some SANE devices use 'Grayscale' instead of the standard 'Gray' */
 395                 if (rc == SANE_STATUS_INVAL && strcmp(mode, SANE_VALUE_SCAN_MODE_GRAY) == 0)
 396                 {
 397                     strcpy(mode, "Grayscale");
 398                     rc = sane_option_set_str(activeDS.deviceHandle, "mode", mode, &status);
 399                 }
 400                 if (rc != SANE_STATUS_GOOD)
 401                     return sane_status_to_twcc(rc);
 402                 if (status & SANE_INFO_RELOAD_PARAMS)
 403                     psane_get_parameters (activeDS.deviceHandle, &activeDS.sane_param);
 404             }
 405             break;
 406
 407         case MSG_GETDEFAULT:
 408             twCC = set_onevalue(pCapability, TWTY_UINT16, activeDS.defaultPixelType);
 409             break;
 410
 411         case MSG_RESET:
 412             current_pixeltype = activeDS.defaultPixelType;
 413             if (! pixeltype_to_sane_mode(current_pixeltype, mode, sizeof(mode)))
 414                 return TWCC_BADVALUE;
 415
 416             status = 0;
 417             rc = sane_option_set_str(activeDS.deviceHandle, "mode", mode, &status);
 418             /* Some SANE devices use 'Grayscale' instead of the standard 'Gray' */
 419             if (rc == SANE_STATUS_INVAL && strcmp(mode, SANE_VALUE_SCAN_MODE_GRAY) == 0)
 420             {
 421                 strcpy(mode, "Grayscale");
 422                 rc = sane_option_set_str(activeDS.deviceHandle, "mode", mode, &status);
 423             }
 424             if (rc != SANE_STATUS_GOOD)
 425                 return sane_status_to_twcc(rc);
 426             if (status & SANE_INFO_RELOAD_PARAMS)
 427                 psane_get_parameters (activeDS.deviceHandle, &activeDS.sane_param);
 428
 429             /* .. fall through intentional .. */
 430
 431         case MSG_GETCURRENT:
 432             twCC = set_onevalue(pCapability, TWTY_UINT16, current_pixeltype);
 433             break;
 434     }
 435
 436 #endif
 437     return twCC;
 438 }
 439
 440 /* ICAP_UNITS */
 441 static TW_UINT16 SANE_ICAPUnits (pTW_CAPABILITY pCapability, TW_UINT16 action)
 442 {
 443     TW_UINT32 val;
 444     TW_UINT16 twCC = TWCC_BADCAP;
 445
 446     TRACE("ICAP_UNITS\n");
 447
 448     switch (action)
 449     {
 450         case MSG_QUERYSUPPORT:
 451             twCC = set_onevalue(pCapability, TWTY_INT32,
 452                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 453             break;
 454
 455         case MSG_GET:
 456             twCC = set_onevalue(pCapability, TWTY_UINT16, TWUN_INCHES);
 457             break;
 458
 459         case MSG_SET:
 460             twCC = msg_set(pCapability, &val);
 461             if (twCC == TWCC_SUCCESS)
 462             {
 463                 if  (val != TWUN_INCHES)
 464                 {
 465                     ERR("Sane supports only SANE_UNIT_DPI\n");
 466                     twCC = TWCC_BADVALUE;
 467                 }
 468             }
 469             break;
 470
 471         case MSG_GETDEFAULT:
 472         case MSG_RESET:
 473             /* .. fall through intentional .. */
 474
 475         case MSG_GETCURRENT:
 476             twCC = set_onevalue(pCapability, TWTY_UINT16, TWUN_INCHES);
 477             break;
 478     }
 479
 480     return twCC;
 481 }
 482
 483 /* ICAP_BITDEPTH */
 484 static TW_UINT16 SANE_ICAPBitDepth(pTW_CAPABILITY pCapability, TW_UINT16 action)
 485 {
 486     TW_UINT16 twCC = TWCC_BADCAP;
 487 #ifdef SONAME_LIBSANE
 488     TW_UINT32 possible_values[1];
 489
 490     TRACE("ICAP_BITDEPTH\n");
 491
 492     possible_values[0] = activeDS.sane_param.depth;
 493
 494     switch (action)
 495     {
 496         case MSG_QUERYSUPPORT:
 497             twCC = set_onevalue(pCapability, TWTY_INT32,
 498                     TWQC_GET | TWQC_GETDEFAULT | TWQC_GETCURRENT  );
 499             break;
 500
 501         case MSG_GET:
 502             twCC = msg_get_enum(pCapability, possible_values, sizeof(possible_values) / sizeof(possible_values[0]),
 503                     TWTY_UINT16, activeDS.sane_param.depth, activeDS.sane_param.depth);
 504             break;
 505
 506         case MSG_GETDEFAULT:
 507             /* .. Fall through intentional .. */
 508
 509         case MSG_GETCURRENT:
 510             twCC = set_onevalue(pCapability, TWTY_UINT16, activeDS.sane_param.depth);
 511             break;
 512     }
 513 #endif
 514     return twCC;
 515 }
 516
 517 /* CAP_UICONTROLLABLE */
 518 static TW_UINT16 SANE_CAPUiControllable(pTW_CAPABILITY pCapability, TW_UINT16 action)
 519 {
 520     TW_UINT16 twCC = TWCC_BADCAP;
 521
 522     TRACE("CAP_UICONTROLLABLE\n");
 523
 524     switch (action)
 525     {
 526         case MSG_QUERYSUPPORT:
 527             twCC = set_onevalue(pCapability, TWTY_INT32, TWQC_GET);
 528             break;
 529
 530         case MSG_GET:
 531             twCC = set_onevalue(pCapability, TWTY_BOOL, TRUE);
 532             break;
 533
 534     }
 535     return twCC;
 536 }
 537
 538 /* ICAP_COMPRESSION */
 539 static TW_UINT16 SANE_ICAPCompression (pTW_CAPABILITY pCapability, TW_UINT16 action)
 540 {
 541     static const TW_UINT32 possible_values[] = { TWCP_NONE };
 542     TW_UINT32 val;
 543     TW_UINT16 twCC = TWCC_BADCAP;
 544
 545     TRACE("ICAP_COMPRESSION\n");
 546
 547     switch (action)
 548     {
 549         case MSG_QUERYSUPPORT:
 550             twCC = set_onevalue(pCapability, TWTY_INT32,
 551                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 552             break;
 553
 554         case MSG_GET:
 555             twCC = msg_get_enum(pCapability, possible_values, sizeof(possible_values) / sizeof(possible_values[0]),
 556                     TWTY_UINT16, TWCP_NONE, TWCP_NONE);
 557             FIXME("Partial stub:  We don't attempt to support compression\n");
 558             break;
 559
 560         case MSG_SET:
 561             twCC = msg_set(pCapability, &val);
 562             if (twCC == TWCC_SUCCESS)
 563                FIXME("Partial Stub:  COMPRESSION set to %d, but ignored\n", val);
 564             break;
 565
 566         case MSG_GETDEFAULT:
 567             twCC = set_onevalue(pCapability, TWTY_UINT16, TWCP_NONE);
 568             break;
 569
 570         case MSG_RESET:
 571             /* .. fall through intentional .. */
 572
 573         case MSG_GETCURRENT:
 574             twCC = set_onevalue(pCapability, TWTY_UINT16, TWCP_NONE);
 575             break;
 576     }
 577     return twCC;
 578 }
 579
 580 /* ICAP_XRESOLUTION, ICAP_YRESOLUTION  */
 581 static TW_UINT16 SANE_ICAPResolution (pTW_CAPABILITY pCapability, TW_UINT16 action,  TW_UINT16 cap)
 582 {
 583     TW_UINT16 twCC = TWCC_BADCAP;
 584 #ifdef SONAME_LIBSANE
 585     TW_UINT32 val;
 586     SANE_Int current_resolution;
 587     TW_FIX32 *default_res;
 588     const char *best_option_name;
 589     SANE_Int minval, maxval, quantval;
 590     SANE_Status sane_rc;
 591     SANE_Int set_status;
 592
 593     TRACE("ICAP_%cRESOLUTION\n", cap == ICAP_XRESOLUTION ? 'X' : 'Y');
 594
 595     /* Some scanners support 'x-resolution', most seem to just support 'resolution' */
 596     if (cap == ICAP_XRESOLUTION)
 597     {
 598         best_option_name = "x-resolution";
 599         default_res = &activeDS.defaultXResolution;
 600     }
 601     else
 602     {
 603         best_option_name = "y-resolution";
 604         default_res = &activeDS.defaultYResolution;
 605     }
 606     if (sane_option_get_int(activeDS.deviceHandle, best_option_name, &current_resolution) != SANE_STATUS_GOOD)
 607     {
 608         best_option_name = "resolution";
 609         if (sane_option_get_int(activeDS.deviceHandle, best_option_name, &current_resolution) != SANE_STATUS_GOOD)
 610             return TWCC_BADCAP;
 611     }
 612
 613     /* Sane does not support a concept of 'default' resolution, so we have to
 614      *   cache the resolution the very first time we load the scanner, and use that
 615      *   as the default */
 616     if (cap == ICAP_XRESOLUTION && ! activeDS.XResolutionSet)
 617     {
 618         default_res->Whole = current_resolution;
 619         default_res->Frac = 0;
 620         activeDS.XResolutionSet = TRUE;
 621     }
 622
 623     if (cap == ICAP_YRESOLUTION && ! activeDS.YResolutionSet)
 624     {
 625         default_res->Whole = current_resolution;
 626         default_res->Frac = 0;
 627         activeDS.YResolutionSet = TRUE;
 628     }
 629
 630     switch (action)
 631     {
 632         case MSG_QUERYSUPPORT:
 633             twCC = set_onevalue(pCapability, TWTY_INT32,
 634                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 635             break;
 636
 637         case MSG_GET:
 638             sane_rc = sane_option_probe_resolution(activeDS.deviceHandle, best_option_name, &minval, &maxval, &quantval);
 639             if (sane_rc != SANE_STATUS_GOOD)
 640                 twCC = TWCC_BADCAP;
 641             else
 642                 twCC = msg_get_range(pCapability, TWTY_FIX32,
 643                                 minval, maxval, quantval == 0 ? 1 : quantval, default_res->Whole, current_resolution);
 644             break;
 645
 646         case MSG_SET:
 647             twCC = msg_set(pCapability, &val);
 648             if (twCC == TWCC_SUCCESS)
 649             {
 650                 TW_FIX32 f32;
 651                 memcpy(&f32, &val, sizeof(f32));
 652                 sane_rc = sane_option_set_int(activeDS.deviceHandle, best_option_name, f32.Whole, &set_status);
 653                 if (sane_rc != SANE_STATUS_GOOD)
 654                 {
 655                     FIXME("Status of %d not expected or handled\n", sane_rc);
 656                     twCC = TWCC_BADCAP;
 657                 }
 658                 else if (set_status == SANE_INFO_INEXACT)
 659                     twCC = TWCC_CHECKSTATUS;
 660             }
 661             break;
 662
 663         case MSG_GETDEFAULT:
 664             twCC = set_onevalue(pCapability, TWTY_FIX32, default_res->Whole);
 665             break;
 666
 667         case MSG_RESET:
 668             sane_rc = sane_option_set_int(activeDS.deviceHandle, best_option_name, default_res->Whole, NULL);
 669             if (sane_rc != SANE_STATUS_GOOD)
 670                 return TWCC_BADCAP;
 671
 672             /* .. fall through intentional .. */
 673
 674         case MSG_GETCURRENT:
 675             twCC = set_onevalue(pCapability, TWTY_FIX32, current_resolution);
 676             break;
 677     }
 678 #endif
 679     return twCC;
 680 }
 681
 682 /* ICAP_PIXELFLAVOR */
 683 static TW_UINT16 SANE_ICAPPixelFlavor (pTW_CAPABILITY pCapability, TW_UINT16 action)
 684 {
 685     static const TW_UINT32 possible_values[] = { TWPF_CHOCOLATE, TWPF_VANILLA };
 686     TW_UINT32 val;
 687     TW_UINT16 twCC = TWCC_BADCAP;
 688
 689     TRACE("ICAP_PIXELFLAVOR\n");
 690
 691     switch (action)
 692     {
 693         case MSG_QUERYSUPPORT:
 694             twCC = set_onevalue(pCapability, TWTY_INT32,
 695                     TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
 696             break;
 697
 698         case MSG_GET:
 699             twCC = msg_get_enum(pCapability, possible_values, sizeof(possible_values) / sizeof(possible_values[0]),
 700                     TWTY_UINT16, TWPF_CHOCOLATE, TWPF_CHOCOLATE);
 701             break;
 702
 703         case MSG_SET:
 704             twCC = msg_set(pCapability, &val);
 705             if (twCC == TWCC_SUCCESS)
 706             {
 707                FIXME("Stub:  PIXELFLAVOR set to %d, but ignored\n", val);
 708             }
 709             break;
 710
 711         case MSG_GETDEFAULT:
 712             twCC = set_onevalue(pCapability, TWTY_UINT16, TWPF_CHOCOLATE);
 713             break;
 714
 715         case MSG_RESET:
 716             /* .. fall through intentional .. */
 717
 718         case MSG_GETCURRENT:
 719             twCC = set_onevalue(pCapability, TWTY_UINT16, TWPF_CHOCOLATE);
 720             break;
 721     }
 722     return twCC;
 723 }
 724
 725
 726 TW_UINT16 SANE_SaneCapability (pTW_CAPABILITY pCapability, TW_UINT16 action)
 727 {
 728     TW_UINT16 twCC = TWCC_CAPUNSUPPORTED;
 729
 730     TRACE("capability=%d action=%d\n", pCapability->Cap, action);
 731
 732     switch (pCapability->Cap)
 733     {
 734         case CAP_SUPPORTEDCAPS:
 735             if (action == MSG_GET)
 736                 twCC = TWAIN_GetSupportedCaps(pCapability);
 737             else
 738                 twCC = TWCC_BADVALUE;
 739             break;
 740
 741         case CAP_XFERCOUNT:
 742             twCC = SANE_CAPXferCount (pCapability, action);
 743             break;
 744
 745         case CAP_UICONTROLLABLE:
 746             twCC = SANE_CAPUiControllable (pCapability, action);
 747             break;
 748
 749         case ICAP_PIXELTYPE:
 750             twCC = SANE_ICAPPixelType (pCapability, action);
 751             break;
 752
 753         case ICAP_UNITS:
 754             twCC = SANE_ICAPUnits (pCapability, action);
 755             break;
 756
 757         case ICAP_BITDEPTH:
 758             twCC = SANE_ICAPBitDepth(pCapability, action);
 759             break;
 760
 761         case ICAP_XFERMECH:
 762             twCC = SANE_ICAPXferMech (pCapability, action);
 763             break;
 764
 765         case ICAP_PIXELFLAVOR:
 766             twCC = SANE_ICAPPixelFlavor (pCapability, action);
 767             break;
 768
 769         case ICAP_COMPRESSION:
 770             twCC = SANE_ICAPCompression(pCapability, action);
 771             break;
 772
 773         case ICAP_XRESOLUTION:
 774             twCC = SANE_ICAPResolution(pCapability, action, pCapability->Cap);
 775             break;
 776
 777         case ICAP_YRESOLUTION:
 778             twCC = SANE_ICAPResolution(pCapability, action, pCapability->Cap);
 779             break;
 780     }
 781
 782     /* Twain specifies that you should return a 0 in response to QUERYSUPPORT,
 783      *   even if you don't formally support the capability */
 784     if (twCC == TWCC_CAPUNSUPPORTED && action == MSG_QUERYSUPPORT)
 785         twCC = set_onevalue(pCapability, 0, TWTY_INT32);
 786
 787     if (twCC == TWCC_CAPUNSUPPORTED)
 788         TRACE("capability 0x%x/action=%d being reported as unsupported\n", pCapability->Cap, action);
 789
 790     return twCC;
 791 }