1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
|
/* sane - Scanner Access Now Easy.
Copyright (C) 2009-12 Stéphane Voltz <stef.dev@free.fr>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* --------------------------------------------------------------------------
*/
/* ------------------------------------------------------------------------- */
/*! \mainpage Primax PagePartner Parallel Port scanner Index Page
*
* \section intro_sec Introduction
*
* This backend provides support for the Prima PagePartner sheet fed parallel
* port scanner.
*
* \section sane_api SANE API
*
* \subsection sane_flow sane flow
SANE FLOW
- sane_init() : initialize backend, attach scanners.
- sane_get_devices() : query list of scanner devices, backend must
probe for new devices.
- sane_open() : open a particular scanner device, adding a handle
to the opened device
- sane_set_io_mode() : set blocking mode
- sane_get_select_fd() : get scanner fd
- sane_get_option_descriptor() : get option information
- sane_control_option() : change option values
- sane_start() : start image acquisition
- sane_get_parameters() : returns actual scan parameters for the ongoing scan
- sane_read() : read image data
- sane_cancel() : cancel operation, end scan
- sane_close() : close opened scanner device, freeing scanner handle
- sane_exit() : terminate use of backend, freeing all resources for attached
devices when last frontend quits
*/
/**
* the build number allow to know which version of the backend is running.
*/
#define BUILD 2301
#include "p5.h"
/**
* Import directly the low level part needed to
* operate scanner. The alternative is to prefix all public functions
* with sanei_p5_ ,and have all the functions prototyped in
* p5_device.h .
*/
#include "p5_device.c"
/**
* number of time the backend has been loaded by sane_init.
*/
static int init_count = 0;
/**
* NULL terminated list of opened frontend sessions. Sessions are
* inserted here on sane_open() and removed on sane_close().
*/
static P5_Session *sessions = NULL;
/**
* NULL terminated list of detected physical devices.
* The same device may be opened several time by different sessions.
* Entry are inserted here by the attach() function.
* */
static P5_Device *devices = NULL;
/**
* NULL terminated list of devices needed by sane_get_devices(), since
* the result returned must stay consistent until next call.
*/
static const SANE_Device **devlist = 0;
/**
* list of possible color modes
*/
static SANE_String_Const mode_list[] = {
SANE_I18N (COLOR_MODE),
SANE_I18N (GRAY_MODE),
/* SANE_I18N (LINEART_MODE), not supported yet */
0
};
static SANE_Range x_range = {
SANE_FIX (0.0), /* minimum */
SANE_FIX (216.0), /* maximum */
SANE_FIX (0.0) /* quantization */
};
static SANE_Range y_range = {
SANE_FIX (0.0), /* minimum */
SANE_FIX (299.0), /* maximum */
SANE_FIX (0.0) /* no quantization */
};
/**
* finds the maximum string length in a string array.
*/
static size_t
max_string_size (const SANE_String_Const strings[])
{
size_t size, max_size = 0;
SANE_Int i;
for (i = 0; strings[i]; ++i)
{
size = strlen (strings[i]) + 1;
if (size > max_size)
max_size = size;
}
return max_size;
}
/**> placeholders for decoded configuration values */
static P5_Config p5cfg;
/* ------------------------------------------------------------------------- */
/*
* SANE Interface
*/
/**
* Called by SANE initially.
*
* From the SANE spec:
* This function must be called before any other SANE function can be
* called. The behavior of a SANE backend is undefined if this
* function is not called first. The version code of the backend is
* returned in the value pointed to by version_code. If that pointer
* is NULL, no version code is returned. Argument authorize is either
* a pointer to a function that is invoked when the backend requires
* authentication for a specific resource or NULL if the frontend does
* not support authentication.
*/
SANE_Status
sane_init (SANE_Int * version_code, SANE_Auth_Callback authorize)
{
SANE_Status status;
(void) authorize; /* get rid of compiler warning */
init_count++;
/* init backend debug */
DBG_INIT ();
DBG (DBG_info, "SANE P5 backend version %d.%d-%d\n",
SANE_CURRENT_MAJOR, SANE_CURRENT_MINOR, BUILD);
DBG (DBG_proc, "sane_init: start\n");
DBG (DBG_trace, "sane_init: init_count=%d\n", init_count);
if (version_code)
*version_code = SANE_VERSION_CODE (SANE_CURRENT_MAJOR, SANE_CURRENT_MINOR, BUILD);
/* cold-plugging case : probe for already plugged devices */
status = probe_p5_devices ();
DBG (DBG_proc, "sane_init: exit\n");
return status;
}
/**
* Called by SANE to find out about supported devices.
*
* From the SANE spec:
* This function can be used to query the list of devices that are
* available. If the function executes successfully, it stores a
* pointer to a NULL terminated array of pointers to SANE_Device
* structures in *device_list. The returned list is guaranteed to
* remain unchanged and valid until (a) another call to this function
* is performed or (b) a call to sane_exit() is performed. This
* function can be called repeatedly to detect when new devices become
* available. If argument local_only is true, only local devices are
* returned (devices directly attached to the machine that SANE is
* running on). If it is false, the device list includes all remote
* devices that are accessible to the SANE library.
*
* SANE does not require that this function is called before a
* sane_open() call is performed. A device name may be specified
* explicitly by a user which would make it unnecessary and
* undesirable to call this function first.
* @param device_list pointer where to store the device list
* @param local_only SANE_TRUE if only local devices are required.
* @return SANE_STATUS_GOOD when successful
*/
SANE_Status
sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only)
{
int dev_num, devnr;
struct P5_Device *device;
SANE_Device *sane_device;
int i;
DBG (DBG_proc, "sane_get_devices: start: local_only = %s\n",
local_only == SANE_TRUE ? "true" : "false");
/* free existing devlist first */
if (devlist)
{
for (i = 0; devlist[i] != NULL; i++)
free ((void *)devlist[i]);
free (devlist);
devlist = NULL;
}
/**
* Since sane_get_devices() may be called repeatedly to detect new devices,
* the device detection must be run at each call. We are handling
* hot-plugging : we probe for devices plugged since sane_init() was called.
*/
probe_p5_devices ();
/* if no devices detected, just return an empty list */
if (devices == NULL)
{
devlist = malloc (sizeof (devlist[0]));
if (!devlist)
return SANE_STATUS_NO_MEM;
devlist[0] = NULL;
*device_list = devlist;
DBG (DBG_proc, "sane_get_devices: exit with no device\n");
return SANE_STATUS_GOOD;
}
/* count physical devices */
devnr = 1;
device = devices;
while (device->next)
{
devnr++;
device = device->next;
}
/* allocate room for the list, plus 1 for the NULL terminator */
devlist = malloc ((devnr + 1) * sizeof (devlist[0]));
if (!devlist)
return SANE_STATUS_NO_MEM;
*device_list = devlist;
dev_num = 0;
device = devices;
/* we build a list of SANE_Device from the list of attached devices */
for (i = 0; i < devnr; i++)
{
/* add device according to local only flag */
if ((local_only == SANE_TRUE && device->local == SANE_TRUE)
|| local_only == SANE_FALSE)
{
/* allocate memory to add the device */
sane_device = malloc (sizeof (*sane_device));
if (!sane_device)
{
return SANE_STATUS_NO_MEM;
}
/* copy data */
sane_device->name = device->name;
sane_device->vendor = device->model->vendor;
sane_device->model = device->model->product;
sane_device->type = device->model->type;
devlist[dev_num] = sane_device;
/* increment device counter */
dev_num++;
}
/* go to next detected device */
device = device->next;
}
devlist[dev_num] = 0;
*device_list = devlist;
DBG (DBG_proc, "sane_get_devices: exit\n");
return SANE_STATUS_GOOD;
}
/**
* Called to establish connection with the session. This function will
* also establish meaningful defaults and initialize the options.
*
* From the SANE spec:
* This function is used to establish a connection to a particular
* device. The name of the device to be opened is passed in argument
* name. If the call completes successfully, a handle for the device
* is returned in *h. As a special case, specifying a zero-length
* string as the device requests opening the first available device
* (if there is such a device). Another special case is to only give
* the name of the backend as the device name, in this case the first
* available device will also be used.
* @param name name of the device to open
* @param handle opaque pointer where to store the pointer of
* the opened P5_Session
* @return SANE_STATUS_GOOD on success
*/
SANE_Status
sane_open (SANE_String_Const name, SANE_Handle * handle)
{
struct P5_Session *session = NULL;
struct P5_Device *device = NULL;
DBG (DBG_proc, "sane_open: start (devicename=%s)\n", name);
/* check there is at least a device */
if (devices == NULL)
{
DBG (DBG_proc, "sane_open: exit, no device to open!\n");
return SANE_STATUS_INVAL;
}
if (name[0] == 0 || strncmp (name, "p5", strlen ("p5")) == 0)
{
DBG (DBG_info,
"sane_open: no specific device requested, using default\n");
if (devices)
{
device = devices;
DBG (DBG_info, "sane_open: device %s used as default device\n",
device->name);
}
}
else
{
DBG (DBG_info, "sane_open: device %s requested\n", name);
/* walk the device list until we find a matching name */
device = devices;
while (device && strcmp (device->name, name) != 0)
{
DBG (DBG_trace, "sane_open: device %s doesn't match\n",
device->name);
device = device->next;
}
}
/* check whether we have found a match or reach the end of the device list */
if (!device)
{
DBG (DBG_info, "sane_open: no device found\n");
return SANE_STATUS_INVAL;
}
/* now we have a device, duplicate it and return it in handle */
DBG (DBG_info, "sane_open: device %s found\n", name);
/* device initialization */
if (device->initialized == SANE_FALSE)
{
/**
* call to hardware initialization function here.
*/
device->fd = open_pp (device->name);
if (device->fd < 0)
{
DBG (DBG_error, "sane_open: failed to open '%s' device!\n",
device->name);
return SANE_STATUS_INVAL;
}
/* now try to connect to scanner */
if (connect (device->fd) != SANE_TRUE)
{
DBG (DBG_error, "sane_open: failed to connect!\n");
close_pp (device->fd);
return SANE_STATUS_INVAL;
}
/* load calibration data */
restore_calibration (device);
/* device link is OK now */
device->initialized = SANE_TRUE;
}
device->buffer = NULL;
device->gain = NULL;
device->offset = NULL;
/* prepare handle to return */
session = (P5_Session *) malloc (sizeof (P5_Session));
if (session == NULL)
{
DBG (DBG_proc, "sane_open: exit OOM\n");
return SANE_STATUS_NO_MEM;
}
/* initialize session */
session->dev = device;
session->scanning = SANE_FALSE;
session->non_blocking = SANE_FALSE;
/* initialize SANE options for this session */
init_options (session);
/* add the handle to the linked list of sessions */
session->next = sessions;
sessions = session;
/* store result */
*handle = session;
/* exit success */
DBG (DBG_proc, "sane_open: exit\n");
return SANE_STATUS_GOOD;
}
/**
* Set non blocking mode. In this mode, read return immediately when
* no data is available within sane_read(), instead of polling the scanner.
*/
SANE_Status
sane_set_io_mode (SANE_Handle handle, SANE_Bool non_blocking)
{
P5_Session *session = (P5_Session *) handle;
DBG (DBG_proc, "sane_set_io_mode: start\n");
if (session->scanning != SANE_TRUE)
{
DBG (DBG_error, "sane_set_io_mode: called out of a scan\n");
return SANE_STATUS_INVAL;
}
session->non_blocking = non_blocking;
DBG (DBG_info, "sane_set_io_mode: I/O mode set to %sblocking.\n",
non_blocking ? "non " : " ");
DBG (DBG_proc, "sane_set_io_mode: exit\n");
return SANE_STATUS_GOOD;
}
/**
* An advanced method we don't support but have to define. At SANE API
* level this function is meant to provide a file descriptor on which the
* frontend can do select()/poll() to wait for data.
*/
SANE_Status
sane_get_select_fd (SANE_Handle handle, SANE_Int * fdp)
{
/* make compiler happy ... */
(void) handle;
(void) fdp;
DBG (DBG_proc, "sane_get_select_fd: start\n");
DBG (DBG_warn, "sane_get_select_fd: unsupported ...\n");
DBG (DBG_proc, "sane_get_select_fd: exit\n");
return SANE_STATUS_UNSUPPORTED;
}
/**
* Returns the options we know.
*
* From the SANE spec:
* This function is used to access option descriptors. The function
* returns the option descriptor for option number n of the device
* represented by handle h. Option number 0 is guaranteed to be a
* valid option. Its value is an integer that specifies the number of
* options that are available for device handle h (the count includes
* option 0). If n is not a valid option index, the function returns
* NULL. The returned option descriptor is guaranteed to remain valid
* (and at the returned address) until the device is closed.
*/
const SANE_Option_Descriptor *
sane_get_option_descriptor (SANE_Handle handle, SANE_Int option)
{
struct P5_Session *session = handle;
DBG (DBG_proc, "sane_get_option_descriptor: start\n");
if ((unsigned) option >= NUM_OPTIONS)
return NULL;
DBG (DBG_info, "sane_get_option_descriptor: \"%s\"\n",
session->options[option].descriptor.name);
DBG (DBG_proc, "sane_get_option_descriptor: exit\n");
return &(session->options[option].descriptor);
}
/**
* sets automatic value for an option , called by sane_control_option after
* all checks have been done */
static SANE_Status
set_automatic_value (P5_Session * s, int option, SANE_Int * myinfo)
{
SANE_Status status = SANE_STATUS_GOOD;
SANE_Int i, min;
SANE_Word *dpi_list;
switch (option)
{
case OPT_TL_X:
s->options[OPT_TL_X].value.w = x_range.min;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_TL_Y:
s->options[OPT_TL_Y].value.w = y_range.min;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_BR_X:
s->options[OPT_BR_X].value.w = x_range.max;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_BR_Y:
s->options[OPT_BR_Y].value.w = y_range.max;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_RESOLUTION:
/* we set up to the lowest available dpi value */
dpi_list =
(SANE_Word *) s->options[OPT_RESOLUTION].descriptor.constraint.
word_list;
min = 65536;
for (i = 1; i < dpi_list[0]; i++)
{
if (dpi_list[i] < min)
min = dpi_list[i];
}
s->options[OPT_RESOLUTION].value.w = min;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_PREVIEW:
s->options[OPT_PREVIEW].value.w = SANE_FALSE;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_MODE:
if (s->options[OPT_MODE].value.s)
free (s->options[OPT_MODE].value.s);
s->options[OPT_MODE].value.s = strdup (mode_list[0]);
*myinfo |= SANE_INFO_RELOAD_OPTIONS;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
default:
DBG (DBG_warn, "set_automatic_value: can't set unknown option %d\n",
option);
}
return status;
}
/**
* sets an option , called by sane_control_option after all
* checks have been done */
static SANE_Status
set_option_value (P5_Session * s, int option, void *val, SANE_Int * myinfo)
{
SANE_Status status = SANE_STATUS_GOOD;
SANE_Word tmpw;
switch (option)
{
case OPT_TL_X:
case OPT_BR_X:
case OPT_TL_Y:
case OPT_BR_Y:
s->options[option].value.w = *(SANE_Word *) val;
/* we ensure geometry is coherent */
/* this happens when user drags TL corner right or below the BR point */
if (s->options[OPT_BR_Y].value.w < s->options[OPT_TL_Y].value.w)
{
tmpw = s->options[OPT_BR_Y].value.w;
s->options[OPT_BR_Y].value.w = s->options[OPT_TL_Y].value.w;
s->options[OPT_TL_Y].value.w = tmpw;
}
if (s->options[OPT_BR_X].value.w < s->options[OPT_TL_X].value.w)
{
tmpw = s->options[OPT_BR_X].value.w;
s->options[OPT_BR_X].value.w = s->options[OPT_TL_X].value.w;
s->options[OPT_TL_X].value.w = tmpw;
}
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_RESOLUTION:
case OPT_PREVIEW:
s->options[option].value.w = *(SANE_Word *) val;
*myinfo |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_MODE:
if (s->options[option].value.s)
free (s->options[option].value.s);
s->options[option].value.s = strdup (val);
*myinfo |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS;
break;
case OPT_CALIBRATE:
status = sheetfed_calibration (s->dev);
*myinfo |= SANE_INFO_RELOAD_OPTIONS;
break;
case OPT_CLEAR_CALIBRATION:
cleanup_calibration (s->dev);
*myinfo |= SANE_INFO_RELOAD_OPTIONS;
break;
default:
DBG (DBG_warn, "set_option_value: can't set unknown option %d\n",
option);
}
return status;
}
/**
* gets an option , called by sane_control_option after all checks
* have been done */
static SANE_Status
get_option_value (P5_Session * s, int option, void *val)
{
SANE_Status status;
switch (option)
{
/* word or word equivalent options: */
case OPT_NUM_OPTS:
case OPT_RESOLUTION:
case OPT_PREVIEW:
case OPT_TL_X:
case OPT_TL_Y:
case OPT_BR_X:
case OPT_BR_Y:
*(SANE_Word *) val = s->options[option].value.w;
break;
/* string options: */
case OPT_MODE:
strcpy (val, s->options[option].value.s);
break;
/* sensor options */
case OPT_PAGE_LOADED_SW:
status = test_document (s->dev->fd);
if (status == SANE_STATUS_GOOD)
s->options[option].value.b = SANE_TRUE;
else
s->options[option].value.b = SANE_FALSE;
*(SANE_Bool *) val = s->options[option].value.b;
break;
case OPT_NEED_CALIBRATION_SW:
*(SANE_Bool *) val = !s->dev->calibrated;
break;
/* unhandled options */
default:
DBG (DBG_warn, "get_option_value: can't get unknown option %d\n",
option);
}
return SANE_STATUS_GOOD;
}
/**
* Gets or sets an option value.
*
* From the SANE spec:
* This function is used to set or inquire the current value of option
* number n of the device represented by handle h. The manner in which
* the option is controlled is specified by parameter action. The
* possible values of this parameter are described in more detail
* below. The value of the option is passed through argument val. It
* is a pointer to the memory that holds the option value. The memory
* area pointed to by v must be big enough to hold the entire option
* value (determined by member size in the corresponding option
* descriptor).
*
* The only exception to this rule is that when setting the value of a
* string option, the string pointed to by argument v may be shorter
* since the backend will stop reading the option value upon
* encountering the first NUL terminator in the string. If argument i
* is not NULL, the value of *i will be set to provide details on how
* well the request has been met.
* action is SANE_ACTION_GET_VALUE, SANE_ACTION_SET_VALUE or SANE_ACTION_SET_AUTO
*/
SANE_Status
sane_control_option (SANE_Handle handle, SANE_Int option,
SANE_Action action, void *val, SANE_Int * info)
{
P5_Session *s = handle;
SANE_Status status;
SANE_Word cap;
SANE_Int myinfo = 0;
DBG (DBG_io2,
"sane_control_option: start: action = %s, option = %s (%d)\n",
(action == SANE_ACTION_GET_VALUE) ? "get" : (action ==
SANE_ACTION_SET_VALUE) ?
"set" : (action == SANE_ACTION_SET_AUTO) ? "set_auto" : "unknown",
s->options[option].descriptor.name, option);
if (info)
*info = 0;
/* do checks before trying to apply action */
if (s->scanning)
{
DBG (DBG_warn, "sane_control_option: don't call this function while "
"scanning (option = %s (%d))\n",
s->options[option].descriptor.name, option);
return SANE_STATUS_DEVICE_BUSY;
}
/* option must be within existing range */
if (option >= NUM_OPTIONS || option < 0)
{
DBG (DBG_warn,
"sane_control_option: option %d >= NUM_OPTIONS || option < 0\n",
option);
return SANE_STATUS_INVAL;
}
/* don't access an inactive option */
cap = s->options[option].descriptor.cap;
if (!SANE_OPTION_IS_ACTIVE (cap))
{
DBG (DBG_warn, "sane_control_option: option %d is inactive\n", option);
return SANE_STATUS_INVAL;
}
/* now checks have been done, apply action */
switch (action)
{
case SANE_ACTION_GET_VALUE:
status = get_option_value (s, option, val);
break;
case SANE_ACTION_SET_VALUE:
if (!SANE_OPTION_IS_SETTABLE (cap))
{
DBG (DBG_warn, "sane_control_option: option %d is not settable\n",
option);
return SANE_STATUS_INVAL;
}
status =
sanei_constrain_value (&s->options[option].descriptor, val, &myinfo);
if (status != SANE_STATUS_GOOD)
{
DBG (DBG_warn,
"sane_control_option: sanei_constrain_value returned %s\n",
sane_strstatus (status));
return status;
}
/* return immediately if no change */
if (s->options[option].descriptor.type == SANE_TYPE_INT
&& *(SANE_Word *) val == s->options[option].value.w)
{
status = SANE_STATUS_GOOD;
}
else
{ /* apply change */
status = set_option_value (s, option, val, &myinfo);
}
break;
case SANE_ACTION_SET_AUTO:
/* sets automatic values */
if (!(cap & SANE_CAP_AUTOMATIC))
{
DBG (DBG_warn,
"sane_control_option: option %d is not autosettable\n",
option);
return SANE_STATUS_INVAL;
}
status = set_automatic_value (s, option, &myinfo);
break;
default:
DBG (DBG_error, "sane_control_option: invalid action %d\n", action);
status = SANE_STATUS_INVAL;
break;
}
if (info)
*info = myinfo;
DBG (DBG_io2, "sane_control_option: exit\n");
return status;
}
/**
* Called by SANE when a page acquisition operation is to be started.
* @param handle opaque handle to a frontend session
* @return SANE_STATUS_GOOD on success, SANE_STATUS_BUSY if the device is
* in use by another session or SANE_STATUS_WARMING_UP if the device is
* warming up. In this case the fronted as to call sane_start again until
* warming up is done. Any other values returned are error status.
*/
SANE_Status
sane_start (SANE_Handle handle)
{
struct P5_Session *session = handle;
int status = SANE_STATUS_GOOD;
P5_Device *dev = session->dev;
DBG (DBG_proc, "sane_start: start\n");
/* if already scanning, tell we're busy */
if (session->scanning == SANE_TRUE)
{
DBG (DBG_info, "sane_start: device is already scanning\n");
return SANE_STATUS_DEVICE_BUSY;
}
/* check that the device has been initialized */
if (dev->initialized == SANE_FALSE)
{
DBG (DBG_error, "sane_start: device is not initialized\n");
return SANE_STATUS_INVAL;
}
/* check if there is a document */
status = test_document (dev->fd);
if (status != SANE_STATUS_GOOD)
{
DBG (DBG_error, "sane_start: device is already scanning\n");
return status;
}
/* we compute all the scan parameters so that */
/* we will be able to set up the registers correctly */
compute_parameters (session);
/* move to scan area if needed */
if (dev->ystart > 0)
{
status = move (dev);
if (status != SANE_STATUS_GOOD)
{
DBG (DBG_error, "sane_start: failed to move to scan area\n");
return SANE_STATUS_INVAL;
}
}
/* send scan command */
status = start_scan (dev, dev->mode, dev->ydpi, dev->xstart, dev->pixels);
if (status != SANE_STATUS_GOOD)
{
DBG (DBG_error, "sane_start: failed to start scan\n");
return SANE_STATUS_INVAL;
}
/* allocates work buffer */
if (dev->buffer != NULL)
{
free (dev->buffer);
}
dev->position = 0;
dev->top = 0;
/* compute amount of lines needed for lds correction */
dev->bottom = dev->bytes_per_line * 2 * dev->lds;
/* computes buffer size, 66 color lines plus eventual amount needed for lds */
dev->size = dev->pixels * 3 * 66 + dev->bottom;
dev->buffer = (uint8_t *) malloc (dev->size);
if (dev->buffer == NULL)
{
DBG (DBG_error, "sane_start: failed to allocate %lu bytes\n", (unsigned long)dev->size);
sane_cancel (handle);
return SANE_STATUS_NO_MEM;
}
/* return now the scan has been initiated */
session->scanning = SANE_TRUE;
session->sent = 0;
DBG (DBG_io, "sane_start: to_send=%d\n", session->to_send);
DBG (DBG_io, "sane_start: size=%lu\n", (unsigned long)dev->size);
DBG (DBG_io, "sane_start: top=%lu\n", (unsigned long)dev->top);
DBG (DBG_io, "sane_start: bottom=%lu\n", (unsigned long)dev->bottom);
DBG (DBG_io, "sane_start: position=%lu\n", (unsigned long)dev->position);
DBG (DBG_proc, "sane_start: exit\n");
return status;
}
/** @brief compute scan parameters
* This function computes two set of parameters. The one for the SANE's standard
* and the other for the hardware. Among these parameters are the bit depth, total
* number of lines, total number of columns, extra line to read for data reordering...
* @param session fronted session to compute final scan parameters
* @return SANE_STATUS_GOOD on success
*/
static SANE_Status
compute_parameters (P5_Session * session)
{
P5_Device *dev = session->dev;
SANE_Int dpi; /* dpi for scan */
SANE_String mode;
SANE_Status status = SANE_STATUS_GOOD;
int tl_x, tl_y, br_x, br_y;
mode = session->options[OPT_MODE].value.s;
dpi = session->options[OPT_RESOLUTION].value.w;
/* scan coordinates */
tl_x = SANE_UNFIX (session->options[OPT_TL_X].value.w);
tl_y = SANE_UNFIX (session->options[OPT_TL_Y].value.w);
br_x = SANE_UNFIX (session->options[OPT_BR_X].value.w);
br_y = SANE_UNFIX (session->options[OPT_BR_Y].value.w);
/* only single pass scanning supported */
session->params.last_frame = SANE_TRUE;
/* gray modes */
if (strcmp (mode, GRAY_MODE) == 0)
{
session->params.format = SANE_FRAME_GRAY;
dev->mode = MODE_GRAY;
dev->lds = 0;
}
else if (strcmp (mode, LINEART_MODE) == 0)
{
session->params.format = SANE_FRAME_GRAY;
dev->mode = MODE_LINEART;
dev->lds = 0;
}
else
{
/* Color */
session->params.format = SANE_FRAME_RGB;
dev->mode = MODE_COLOR;
dev->lds = (dev->model->lds * dpi) / dev->model->max_ydpi;
}
/* SANE level values */
session->params.lines = ((br_y - tl_y) * dpi) / MM_PER_INCH;
if (session->params.lines == 0)
session->params.lines = 1;
session->params.pixels_per_line = ((br_x - tl_x) * dpi) / MM_PER_INCH;
if (session->params.pixels_per_line == 0)
session->params.pixels_per_line = 1;
DBG (DBG_data, "compute_parameters: pixels_per_line =%d\n",
session->params.pixels_per_line);
if (strcmp (mode, LINEART_MODE) == 0)
{
session->params.depth = 1;
/* in lineart, having pixels multiple of 8 avoids a costly test */
/* at each bit to see we must go to the next byte */
/* TODO : implement this requirement in sane_control_option */
session->params.pixels_per_line =
((session->params.pixels_per_line + 7) / 8) * 8;
}
else
session->params.depth = 8;
/* width needs to be even */
if (session->params.pixels_per_line & 1)
session->params.pixels_per_line++;
/* Hardware settings : they can differ from the ones at SANE level */
/* for instance the effective DPI used by a sensor may be higher */
/* than the one needed for the SANE scan parameters */
dev->lines = session->params.lines;
dev->pixels = session->params.pixels_per_line;
/* motor and sensor DPI */
dev->xdpi = dpi;
dev->ydpi = dpi;
/* handle bounds of motor's dpi range */
if (dev->ydpi > dev->model->max_ydpi)
{
dev->ydpi = dev->model->max_ydpi;
dev->lines = (dev->lines * dev->model->max_ydpi) / dpi;
if (dev->lines == 0)
dev->lines = 1;
/* round number of lines */
session->params.lines =
(session->params.lines / dev->lines) * dev->lines;
if (session->params.lines == 0)
session->params.lines = 1;
}
if (dev->ydpi < dev->model->min_ydpi)
{
dev->ydpi = dev->model->min_ydpi;
dev->lines = (dev->lines * dev->model->min_ydpi) / dpi;
}
/* hardware values */
dev->xstart =
((SANE_UNFIX (dev->model->x_offset) + tl_x) * dpi) / MM_PER_INCH;
dev->ystart =
((SANE_UNFIX (dev->model->y_offset) + tl_y) * dev->ydpi) / MM_PER_INCH;
/* take lds correction into account when moving to scan area */
if (dev->ystart > 2 * dev->lds)
dev->ystart -= 2 * dev->lds;
/* computes bytes per line */
session->params.bytes_per_line = session->params.pixels_per_line;
dev->bytes_per_line = dev->pixels;
if (session->params.format == SANE_FRAME_RGB)
{
dev->bytes_per_line *= 3;
}
/* in lineart mode we adjust bytes_per_line needed by frontend */
/* we do that here because we needed sent/to_send to be as if */
/* there was no lineart */
if (session->params.depth == 1)
{
session->params.bytes_per_line =
(session->params.bytes_per_line + 7) / 8;
}
session->params.bytes_per_line = dev->bytes_per_line;
session->to_send = session->params.bytes_per_line * session->params.lines;
session->params.bytes_per_line = dev->bytes_per_line;
DBG (DBG_data, "compute_parameters: bytes_per_line =%d\n",
session->params.bytes_per_line);
DBG (DBG_data, "compute_parameters: depth =%d\n",
session->params.depth);
DBG (DBG_data, "compute_parameters: lines =%d\n",
session->params.lines);
DBG (DBG_data, "compute_parameters: image size =%d\n",
session->to_send);
DBG (DBG_data, "compute_parameters: xstart =%d\n", dev->xstart);
DBG (DBG_data, "compute_parameters: ystart =%d\n", dev->ystart);
DBG (DBG_data, "compute_parameters: dev lines =%d\n", dev->lines);
DBG (DBG_data, "compute_parameters: dev bytes per line=%d\n",
dev->bytes_per_line);
DBG (DBG_data, "compute_parameters: dev pixels =%d\n", dev->pixels);
DBG (DBG_data, "compute_parameters: lds =%d\n", dev->lds);
return status;
}
/**
* Called by SANE to retrieve information about the type of data
* that the current scan will return.
*
* From the SANE spec:
* This function is used to obtain the current scan parameters. The
* returned parameters are guaranteed to be accurate between the time
* a scan has been started (sane_start() has been called) and the
* completion of that request. Outside of that window, the returned
* values are best-effort estimates of what the parameters will be
* when sane_start() gets invoked.
*
* Calling this function before a scan has actually started allows,
* for example, to get an estimate of how big the scanned image will
* be. The parameters passed to this function are the handle of the
* device for which the parameters should be obtained and a pointer
* to a parameter structure.
*/
SANE_Status
sane_get_parameters (SANE_Handle handle, SANE_Parameters * params)
{
SANE_Status status;
struct P5_Session *session = (struct P5_Session *) handle;
DBG (DBG_proc, "sane_get_parameters: start\n");
/* call parameters computing function */
status = compute_parameters (session);
if (status == SANE_STATUS_GOOD && params)
*params = session->params;
DBG (DBG_proc, "sane_get_parameters: exit\n");
return status;
}
/**
* Called by SANE to read data.
*
* From the SANE spec:
* This function is used to read image data from the device
* represented by handle h. Argument buf is a pointer to a memory
* area that is at least maxlen bytes long. The number of bytes
* returned is stored in *len. A backend must set this to zero when
* the call fails (i.e., when a status other than SANE_STATUS_GOOD is
* returned).
*
* When the call succeeds, the number of bytes returned can be
* anywhere in the range from 0 to maxlen bytes.
*
* Returned data is read from working buffer.
*/
SANE_Status
sane_read (SANE_Handle handle, SANE_Byte * buf,
SANE_Int max_len, SANE_Int * len)
{
struct P5_Session *session = (struct P5_Session *) handle;
struct P5_Device *dev = session->dev;
SANE_Status status = SANE_STATUS_GOOD;
int count;
int size, lines;
SANE_Bool x2;
SANE_Int i;
DBG (DBG_proc, "sane_read: start\n");
DBG (DBG_io, "sane_read: up to %d bytes required by frontend\n", max_len);
/* some sanity checks first to protect from would be buggy frontends */
if (!session)
{
DBG (DBG_error, "sane_read: handle is null!\n");
return SANE_STATUS_INVAL;
}
if (!buf)
{
DBG (DBG_error, "sane_read: buf is null!\n");
return SANE_STATUS_INVAL;
}
if (!len)
{
DBG (DBG_error, "sane_read: len is null!\n");
return SANE_STATUS_INVAL;
}
/* no data read yet */
*len = 0;
/* check if session is scanning */
if (!session->scanning)
{
DBG (DBG_warn,
"sane_read: scan was cancelled, is over or has not been initiated yet\n");
return SANE_STATUS_CANCELLED;
}
/* check for EOF, must be done before any physical read */
if (session->sent >= session->to_send)
{
DBG (DBG_io, "sane_read: end of scan reached\n");
return SANE_STATUS_EOF;
}
/* if working buffer is empty, we do a physical data read */
if (dev->top <= dev->bottom)
{
DBG (DBG_io, "sane_read: physical data read\n");
/* check is there is data available. In case of non-blocking mode we return
* as soon it is detected there is no data yet. Reads must by done line by
* line, so we read only when count is bigger than bytes per line
* */
count = available_bytes (dev->fd);
DBG (DBG_io, "sane_read: count=%d bytes\n", count);
if (count < dev->bytes_per_line && session->non_blocking == SANE_TRUE)
{
DBG (DBG_io, "sane_read: scanner hasn't enough data available\n");
DBG (DBG_proc, "sane_read: exit\n");
return SANE_STATUS_GOOD;
}
/* now we can wait for data here */
while (count < dev->bytes_per_line)
{
/* test if document left the feeder, so we have to terminate the scan */
status = test_document (dev->fd);
if (status == SANE_STATUS_NO_DOCS)
{
session->to_send = session->sent;
return SANE_STATUS_EOF;
}
/* don't call scanner too often */
usleep (10000);
count = available_bytes (dev->fd);
}
/** compute size of physical data to read
* on first read, position will be 0, while it will be 'bottom'
* for the subsequent reads.
* We try to read a complete buffer */
size = dev->size - dev->position;
if (session->to_send - session->sent < size)
{
/* not enough data left, so read remainder of scan */
size = session->to_send - session->sent;
}
/* 600 dpi is 300x600 physical, and 400 is 200x400 */
if (dev->ydpi > dev->model->max_xdpi)
{
x2 = SANE_TRUE;
}
else
{
x2 = SANE_FALSE;
}
lines = read_line (dev,
dev->buffer + dev->position,
dev->bytes_per_line,
size / dev->bytes_per_line,
SANE_TRUE, x2, dev->mode, dev->calibrated);
/* handle document end detection TODO try to recover the partial
* buffer already read before EOD */
if (lines == -1)
{
DBG (DBG_io, "sane_read: error reading line\n");
return SANE_STATUS_IO_ERROR;
}
/* gather lines until we have more than needed for lds */
dev->position += lines * dev->bytes_per_line;
dev->top = dev->position;
if (dev->position > dev->bottom)
{
dev->position = dev->bottom;
}
DBG (DBG_io, "sane_read: size =%lu\n", (unsigned long)dev->size);
DBG (DBG_io, "sane_read: bottom =%lu\n", (unsigned long)dev->bottom);
DBG (DBG_io, "sane_read: position=%lu\n", (unsigned long)dev->position);
DBG (DBG_io, "sane_read: top =%lu\n", (unsigned long)dev->top);
} /* end of physical data reading */
/* logical data reading */
/* check if there data available in working buffer */
if (dev->position < dev->top && dev->position >= dev->bottom)
{
DBG (DBG_io, "sane_read: logical data read\n");
/* we have more data in internal buffer than asked ,
* then send only max data */
size = dev->top - dev->position;
if (max_len < size)
{
*len = max_len;
}
else
/* if we don't have enough, send all what we have */
{
*len = dev->top - dev->position;
}
/* data copy */
if (dev->lds == 0)
{
memcpy (buf, dev->buffer + dev->position, *len);
}
else
{
/* compute count of bytes for lds */
count = dev->lds * dev->bytes_per_line;
/* adjust for lds as we copy data to frontend */
for (i = 0; i < *len; i++)
{
switch ((dev->position + i) % 3)
{
/* red */
case 0:
buf[i] = dev->buffer[dev->position + i - 2 * count];
break;
/* green */
case 1:
buf[i] = dev->buffer[dev->position + i - count];
break;
/* blue */
default:
buf[i] = dev->buffer[dev->position + i];
break;
}
}
}
dev->position += *len;
/* update byte accounting */
session->sent += *len;
DBG (DBG_io, "sane_read: sent %d bytes from buffer to frontend\n",
*len);
return SANE_STATUS_GOOD;
}
/* check if we exhausted working buffer */
if (dev->position >= dev->top && dev->position >= dev->bottom)
{
/* copy extra lines needed for lds in next buffer */
if (dev->position > dev->bottom && dev->lds > 0)
{
memcpy (dev->buffer,
dev->buffer + dev->position - dev->bottom, dev->bottom);
}
/* restart buffer */
dev->position = dev->bottom;
dev->top = 0;
}
DBG (DBG_io, "sane_read: size =%lu\n", (unsigned long)dev->size);
DBG (DBG_io, "sane_read: bottom =%lu\n", (unsigned long)dev->bottom);
DBG (DBG_io, "sane_read: position=%lu\n", (unsigned long)dev->position);
DBG (DBG_io, "sane_read: top =%lu\n", (unsigned long)dev->top);
DBG (DBG_proc, "sane_read: exit\n");
return status;
}
/**
* Cancels a scan.
*
* From the SANE spec:
* This function is used to immediately or as quickly as possible
* cancel the currently pending operation of the device represented by
* handle h. This function can be called at any time (as long as
* handle h is a valid handle) but usually affects long-running
* operations only (such as image is acquisition). It is safe to call
* this function asynchronously (e.g., from within a signal handler).
* It is important to note that completion of this operation does not
* imply that the currently pending operation has been cancelled. It
* only guarantees that cancellation has been initiated. Cancellation
* completes only when the cancelled call returns (typically with a
* status value of SANE_STATUS_CANCELLED). Since the SANE API does
* not require any other operations to be re-entrant, this implies
* that a frontend must not call any other operation until the
* cancelled operation has returned.
*/
void
sane_cancel (SANE_Handle handle)
{
P5_Session *session = handle;
DBG (DBG_proc, "sane_cancel: start\n");
/* if scanning, abort and park head */
if (session->scanning == SANE_TRUE)
{
/* detects if we are called after the scan is finished,
* or if the scan is aborted */
if (session->sent < session->to_send)
{
DBG (DBG_info, "sane_cancel: aborting scan.\n");
/* device hasn't finished scan, we are aborting it
* and we may have to do something specific for it here */
}
else
{
DBG (DBG_info, "sane_cancel: cleaning up after scan.\n");
}
session->scanning = SANE_FALSE;
}
eject (session->dev->fd);
DBG (DBG_proc, "sane_cancel: exit\n");
}
/**
* Ends use of the session.
*
* From the SANE spec:
* This function terminates the association between the device handle
* passed in argument h and the device it represents. If the device is
* presently active, a call to sane_cancel() is performed first. After
* this function returns, handle h must not be used anymore.
*
* Handle resources are free'd before disposing the handle. But devices
* resources must not be mdofied, since it could be used or reused until
* sane_exit() is called.
*/
void
sane_close (SANE_Handle handle)
{
P5_Session *prev, *session;
DBG (DBG_proc, "sane_close: start\n");
/* remove handle from list of open handles: */
prev = NULL;
for (session = sessions; session; session = session->next)
{
if (session == handle)
break;
prev = session;
}
if (!session)
{
DBG (DBG_error0, "close: invalid handle %p\n", handle);
return; /* oops, not a handle we know about */
}
/* cancel any active scan */
if (session->scanning == SANE_TRUE)
{
sane_cancel (handle);
}
if (prev)
prev->next = session->next;
else
sessions = session->next;
/* close low level device */
if (session->dev->initialized == SANE_TRUE)
{
if (session->dev->calibrated == SANE_TRUE)
{
save_calibration (session->dev);
}
disconnect (session->dev->fd);
close_pp (session->dev->fd);
session->dev->fd = -1;
session->dev->initialized = SANE_FALSE;
/* free device data */
if (session->dev->buffer != NULL)
{
free (session->dev->buffer);
}
if (session->dev->buffer != NULL)
{
free (session->dev->gain);
free (session->dev->offset);
}
if (session->dev->calibrated == SANE_TRUE)
{
cleanup_calibration (session->dev);
}
}
/* free per session data */
free (session->options[OPT_MODE].value.s);
free ((void *)session->options[OPT_RESOLUTION].descriptor.constraint.word_list);
free (session);
DBG (DBG_proc, "sane_close: exit\n");
}
/**
* Terminates the backend.
*
* From the SANE spec:
* This function must be called to terminate use of a backend. The
* function will first close all device handles that still might be
* open (it is recommended to close device handles explicitly through
* a call to sane_close(), but backends are required to release all
* resources upon a call to this function). After this function
* returns, no function other than sane_init() may be called
* (regardless of the status value returned by sane_exit(). Neglecting
* to call this function may result in some resources not being
* released properly.
*/
void
sane_exit (void)
{
struct P5_Session *session, *next;
struct P5_Device *dev, *nextdev;
int i;
DBG (DBG_proc, "sane_exit: start\n");
init_count--;
if (init_count > 0)
{
DBG (DBG_info,
"sane_exit: still %d fronteds to leave before effective exit.\n",
init_count);
return;
}
/* free session structs */
for (session = sessions; session; session = next)
{
next = session->next;
sane_close ((SANE_Handle *) session);
free (session);
}
sessions = NULL;
/* free devices structs */
for (dev = devices; dev; dev = nextdev)
{
nextdev = dev->next;
free (dev->name);
free (dev);
}
devices = NULL;
/* now list of devices */
if (devlist)
{
i = 0;
while ((SANE_Device *) devlist[i])
{
free ((SANE_Device *) devlist[i]);
i++;
}
free (devlist);
devlist = NULL;
}
DBG (DBG_proc, "sane_exit: exit\n");
}
/** @brief probe for all supported devices
* This functions tries to probe if any of the supported devices of
* the backend is present. Each detected device will be added to the
* 'devices' list
*/
static SANE_Status
probe_p5_devices (void)
{
/**> configuration structure used during attach */
SANEI_Config config;
/**> list of configuration options */
SANE_Option_Descriptor *cfg_options[NUM_CFG_OPTIONS];
/**> placeholders pointers for option values */
void *values[NUM_CFG_OPTIONS];
int i;
SANE_Status status;
DBG (DBG_proc, "probe_p5_devices: start\n");
/* initialize configuration options */
cfg_options[CFG_MODEL_NAME] =
(SANE_Option_Descriptor *) malloc (sizeof (SANE_Option_Descriptor));
cfg_options[CFG_MODEL_NAME]->name = "modelname";
cfg_options[CFG_MODEL_NAME]->desc = "user provided scanner's model name";
cfg_options[CFG_MODEL_NAME]->type = SANE_TYPE_INT;
cfg_options[CFG_MODEL_NAME]->unit = SANE_UNIT_NONE;
cfg_options[CFG_MODEL_NAME]->size = sizeof (SANE_Word);
cfg_options[CFG_MODEL_NAME]->cap = SANE_CAP_SOFT_SELECT;
cfg_options[CFG_MODEL_NAME]->constraint_type = SANE_CONSTRAINT_NONE;
values[CFG_MODEL_NAME] = &p5cfg.modelname;
/* set configuration options structure */
config.descriptors = cfg_options;
config.values = values;
config.count = NUM_CFG_OPTIONS;
/* generic configure and attach function */
status = sanei_configure_attach (P5_CONFIG_FILE, &config,
config_attach, NULL);
/* free allocated options */
for (i = 0; i < NUM_CFG_OPTIONS; i++)
{
free (cfg_options[i]);
}
DBG (DBG_proc, "probe_p5_devices: end\n");
return status;
}
/** This function is called by sanei_configure_attach to try
* to attach the backend to a device specified by the configuration file.
*
* @param config configuration structure filled with values read
* from configuration file
* @param devname name of the device to try to attach to, it is
* the unprocessed line of the configuration file
*
* @return status SANE_STATUS_GOOD if no errors (even if no matching
* devices found)
* SANE_STATUS_INVAL in case of error
*/
static SANE_Status
config_attach (SANEI_Config __sane_unused__ * config, const char *devname,
void __sane_unused__ *data)
{
/* currently, the config is a global variable so config is useless here */
/* the correct thing would be to have a generic sanei_attach_matching_devices
* using an attach function with a config parameter */
(void) config;
/* the devname has been processed and is ready to be used
* directly. The config struct contains all the configuration data for
* the corresponding device. Since there is no resources common to each
* backends regarding parallel port, we can directly call the attach
* function. */
attach_p5 (devname, config);
return SANE_STATUS_GOOD;
}
/** @brief try to attach to a device by its name
* The attach tries to open the given device and match it
* with devices handled by the backend. The configuration parameter
* contains the values of the already parsed configuration options
* from the conf file.
* @param config configuration structure filled with values read
* from configuration file
* @param devicename name of the device to try to attach to, it is
* the unprocessed line of the configuration file
*
* @return status SANE_STATUS_GOOD if no errors (even if no matching
* devices found)
* SANE_STATUS_NOM_MEM if there isn't enough memory to allocate the
* device structure
* SANE_STATUS_UNSUPPORTED if the device if unknown by the backend
* SANE_STATUS_INVAL in case of other error
*/
static SANE_Status
attach_p5 (const char *devicename, SANEI_Config * config)
{
struct P5_Device *device;
struct P5_Model *model;
DBG (DBG_proc, "attach(%s): start\n", devicename);
if(config==NULL)
{
DBG (DBG_warn, "attach: config is NULL\n");
}
/* search if we already have it attached */
for (device = devices; device; device = device->next)
{
if (strcmp (device->name, devicename) == 0)
{
DBG (DBG_info, "attach: device already attached\n");
DBG (DBG_proc, "attach: exit\n");
return SANE_STATUS_GOOD;
}
}
/**
* do physical probe of the device here. In case the device is recognized,
* we allocate a device struct and give it options and model.
* Else we return SANE_STATUS_UNSUPPORTED.
*/
model = probe (devicename);
if (model == NULL)
{
DBG (DBG_info,
"attach: device %s is not managed by the backend\n", devicename);
DBG (DBG_proc, "attach: exit\n");
return SANE_STATUS_UNSUPPORTED;
}
/* allocate device struct */
device = malloc (sizeof (*device));
if (device == NULL)
{
return SANE_STATUS_NO_MEM;
DBG (DBG_proc, "attach: exit\n");
}
memset (device, 0, sizeof (*device));
device->model = model;
/* name of the device */
device->name = strdup (devicename);
DBG (DBG_info, "attach: found %s %s %s at %s\n",
device->model->vendor, device->model->product, device->model->type,
device->name);
/* we insert new device at start of the chained list */
/* head of the list becomes the next, and start is replaced */
/* with the new session struct */
device->next = devices;
devices = device;
/* initialization is done at sane_open */
device->initialized = SANE_FALSE;
device->calibrated = SANE_FALSE;
DBG (DBG_proc, "attach: exit\n");
return SANE_STATUS_GOOD;
}
/** @brief set initial value for the scanning options
* for each sessions, control options are initialized based on the capability
* of the model of the physical device.
* @param session scanner session to initialize options
* @return SANE_STATUS_GOOD on success
*/
static SANE_Status
init_options (struct P5_Session *session)
{
SANE_Int option, i, min, idx;
SANE_Word *dpi_list;
P5_Model *model = session->dev->model;
DBG (DBG_proc, "init_options: start\n");
/* we first initialize each options with a default value */
memset (session->options, 0, sizeof (session->options[OPT_NUM_OPTS]));
for (option = 0; option < NUM_OPTIONS; option++)
{
session->options[option].descriptor.size = sizeof (SANE_Word);
session->options[option].descriptor.cap =
SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT;
}
/* we set up all the options listed in the P5_Option enum */
/* last option / end of list marker */
session->options[OPT_NUM_OPTS].descriptor.name = SANE_NAME_NUM_OPTIONS;
session->options[OPT_NUM_OPTS].descriptor.title = SANE_TITLE_NUM_OPTIONS;
session->options[OPT_NUM_OPTS].descriptor.desc = SANE_DESC_NUM_OPTIONS;
session->options[OPT_NUM_OPTS].descriptor.type = SANE_TYPE_INT;
session->options[OPT_NUM_OPTS].descriptor.cap = SANE_CAP_SOFT_DETECT;
session->options[OPT_NUM_OPTS].value.w = NUM_OPTIONS;
/* "Standard" group: */
session->options[OPT_STANDARD_GROUP].descriptor.title = SANE_TITLE_STANDARD;
session->options[OPT_STANDARD_GROUP].descriptor.name = SANE_NAME_STANDARD;
session->options[OPT_STANDARD_GROUP].descriptor.desc = SANE_DESC_STANDARD;
session->options[OPT_STANDARD_GROUP].descriptor.type = SANE_TYPE_GROUP;
session->options[OPT_STANDARD_GROUP].descriptor.size = 0;
session->options[OPT_STANDARD_GROUP].descriptor.cap = 0;
session->options[OPT_STANDARD_GROUP].descriptor.constraint_type =
SANE_CONSTRAINT_NONE;
/* scan mode */
session->options[OPT_MODE].descriptor.name = SANE_NAME_SCAN_MODE;
session->options[OPT_MODE].descriptor.title = SANE_TITLE_SCAN_MODE;
session->options[OPT_MODE].descriptor.desc = SANE_DESC_SCAN_MODE;
session->options[OPT_MODE].descriptor.type = SANE_TYPE_STRING;
session->options[OPT_MODE].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_MODE].descriptor.constraint_type =
SANE_CONSTRAINT_STRING_LIST;
session->options[OPT_MODE].descriptor.size = max_string_size (mode_list);
session->options[OPT_MODE].descriptor.constraint.string_list = mode_list;
session->options[OPT_MODE].value.s = strdup (mode_list[0]);
/* preview */
session->options[OPT_PREVIEW].descriptor.name = SANE_NAME_PREVIEW;
session->options[OPT_PREVIEW].descriptor.title = SANE_TITLE_PREVIEW;
session->options[OPT_PREVIEW].descriptor.desc = SANE_DESC_PREVIEW;
session->options[OPT_PREVIEW].descriptor.type = SANE_TYPE_BOOL;
session->options[OPT_PREVIEW].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_PREVIEW].descriptor.unit = SANE_UNIT_NONE;
session->options[OPT_PREVIEW].descriptor.constraint_type =
SANE_CONSTRAINT_NONE;
session->options[OPT_PREVIEW].value.w = SANE_FALSE;
/** @brief build resolution list
* We merge xdpi and ydpi list to provide only one resolution option control.
* This is the most common case for backends and fronteds and give 'square'
* pixels. The SANE API allow to control x and y dpi independently, but this is
* rarely done and may confuse both frontends and users. In case a dpi value exists
* for one but not for the other, the backend will have to crop data so that the
* frontend is unaffected. A common case is that motor resolution (ydpi) is higher
* than sensor resolution (xdpi), so scan lines must be scaled up to keep square
* pixel when doing sane_read().
* TODO this deserves a dedicated function and some unit testing
*/
/* find minimum first */
min = 65535;
for (i = 0; i < MAX_RESOLUTIONS && model->xdpi_values[i] > 0; i++)
{
if (model->xdpi_values[i] < min)
min = model->xdpi_values[i];
}
for (i = 0; i < MAX_RESOLUTIONS && model->ydpi_values[i] > 0; i++)
{
if (model->ydpi_values[i] < min)
min = model->ydpi_values[i];
}
dpi_list = malloc ((MAX_RESOLUTIONS * 2 + 1) * sizeof (SANE_Word));
if (!dpi_list)
return SANE_STATUS_NO_MEM;
dpi_list[1] = min;
idx = 2;
/* find any value greater than the last used min and
* less than the max value
*/
do
{
min = 65535;
for (i = 0; i < MAX_RESOLUTIONS && model->xdpi_values[i] > 0; i++)
{
if (model->xdpi_values[i] < min
&& model->xdpi_values[i] > dpi_list[idx - 1])
min = model->xdpi_values[i];
}
for (i = 0; i < MAX_RESOLUTIONS && model->ydpi_values[i] > 0; i++)
{
if (model->ydpi_values[i] < min
&& model->ydpi_values[i] > dpi_list[idx - 1])
min = model->ydpi_values[i];
}
if (min < 65535)
{
dpi_list[idx] = min;
idx++;
}
}
while (min != 65535);
dpi_list[idx] = 0;
/* the count of different resolution is put at the beginning */
dpi_list[0] = idx - 1;
session->options[OPT_RESOLUTION].descriptor.name =
SANE_NAME_SCAN_RESOLUTION;
session->options[OPT_RESOLUTION].descriptor.title =
SANE_TITLE_SCAN_RESOLUTION;
session->options[OPT_RESOLUTION].descriptor.desc =
SANE_DESC_SCAN_RESOLUTION;
session->options[OPT_RESOLUTION].descriptor.type = SANE_TYPE_INT;
session->options[OPT_RESOLUTION].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_RESOLUTION].descriptor.unit = SANE_UNIT_DPI;
session->options[OPT_RESOLUTION].descriptor.constraint_type =
SANE_CONSTRAINT_WORD_LIST;
session->options[OPT_RESOLUTION].descriptor.constraint.word_list = dpi_list;
/* initial value is lowest available dpi */
session->options[OPT_RESOLUTION].value.w = min;
/* "Geometry" group: */
session->options[OPT_GEOMETRY_GROUP].descriptor.title = SANE_TITLE_GEOMETRY;
session->options[OPT_GEOMETRY_GROUP].descriptor.name = SANE_NAME_GEOMETRY;
session->options[OPT_GEOMETRY_GROUP].descriptor.desc = SANE_DESC_GEOMETRY;
session->options[OPT_GEOMETRY_GROUP].descriptor.type = SANE_TYPE_GROUP;
session->options[OPT_GEOMETRY_GROUP].descriptor.cap = SANE_CAP_ADVANCED;
session->options[OPT_GEOMETRY_GROUP].descriptor.size = 0;
session->options[OPT_GEOMETRY_GROUP].descriptor.constraint_type =
SANE_CONSTRAINT_NONE;
/* adapt the constraint range to the detected model */
x_range.max = model->x_size;
y_range.max = model->y_size;
/* top-left x */
session->options[OPT_TL_X].descriptor.name = SANE_NAME_SCAN_TL_X;
session->options[OPT_TL_X].descriptor.title = SANE_TITLE_SCAN_TL_X;
session->options[OPT_TL_X].descriptor.desc = SANE_DESC_SCAN_TL_X;
session->options[OPT_TL_X].descriptor.type = SANE_TYPE_FIXED;
session->options[OPT_TL_X].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_TL_X].descriptor.unit = SANE_UNIT_MM;
session->options[OPT_TL_X].descriptor.constraint_type =
SANE_CONSTRAINT_RANGE;
session->options[OPT_TL_X].descriptor.constraint.range = &x_range;
session->options[OPT_TL_X].value.w = 0;
/* top-left y */
session->options[OPT_TL_Y].descriptor.name = SANE_NAME_SCAN_TL_Y;
session->options[OPT_TL_Y].descriptor.title = SANE_TITLE_SCAN_TL_Y;
session->options[OPT_TL_Y].descriptor.desc = SANE_DESC_SCAN_TL_Y;
session->options[OPT_TL_Y].descriptor.type = SANE_TYPE_FIXED;
session->options[OPT_TL_Y].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_TL_Y].descriptor.unit = SANE_UNIT_MM;
session->options[OPT_TL_Y].descriptor.constraint_type =
SANE_CONSTRAINT_RANGE;
session->options[OPT_TL_Y].descriptor.constraint.range = &y_range;
session->options[OPT_TL_Y].value.w = 0;
/* bottom-right x */
session->options[OPT_BR_X].descriptor.name = SANE_NAME_SCAN_BR_X;
session->options[OPT_BR_X].descriptor.title = SANE_TITLE_SCAN_BR_X;
session->options[OPT_BR_X].descriptor.desc = SANE_DESC_SCAN_BR_X;
session->options[OPT_BR_X].descriptor.type = SANE_TYPE_FIXED;
session->options[OPT_BR_X].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_BR_X].descriptor.unit = SANE_UNIT_MM;
session->options[OPT_BR_X].descriptor.constraint_type =
SANE_CONSTRAINT_RANGE;
session->options[OPT_BR_X].descriptor.constraint.range = &x_range;
session->options[OPT_BR_X].value.w = x_range.max;
/* bottom-right y */
session->options[OPT_BR_Y].descriptor.name = SANE_NAME_SCAN_BR_Y;
session->options[OPT_BR_Y].descriptor.title = SANE_TITLE_SCAN_BR_Y;
session->options[OPT_BR_Y].descriptor.desc = SANE_DESC_SCAN_BR_Y;
session->options[OPT_BR_Y].descriptor.type = SANE_TYPE_FIXED;
session->options[OPT_BR_Y].descriptor.cap |= SANE_CAP_AUTOMATIC;
session->options[OPT_BR_Y].descriptor.unit = SANE_UNIT_MM;
session->options[OPT_BR_Y].descriptor.constraint_type =
SANE_CONSTRAINT_RANGE;
session->options[OPT_BR_Y].descriptor.constraint.range = &y_range;
session->options[OPT_BR_Y].value.w = y_range.max;
/* sensor group */
session->options[OPT_SENSOR_GROUP].descriptor.name = SANE_NAME_SENSORS;
session->options[OPT_SENSOR_GROUP].descriptor.title = SANE_TITLE_SENSORS;
session->options[OPT_SENSOR_GROUP].descriptor.desc = SANE_DESC_SENSORS;
session->options[OPT_SENSOR_GROUP].descriptor.type = SANE_TYPE_GROUP;
session->options[OPT_SENSOR_GROUP].descriptor.constraint_type =
SANE_CONSTRAINT_NONE;
/* page loaded sensor */
session->options[OPT_PAGE_LOADED_SW].descriptor.name =
SANE_NAME_PAGE_LOADED;
session->options[OPT_PAGE_LOADED_SW].descriptor.title =
SANE_TITLE_PAGE_LOADED;
session->options[OPT_PAGE_LOADED_SW].descriptor.desc =
SANE_DESC_PAGE_LOADED;
session->options[OPT_PAGE_LOADED_SW].descriptor.type = SANE_TYPE_BOOL;
session->options[OPT_PAGE_LOADED_SW].descriptor.unit = SANE_UNIT_NONE;
session->options[OPT_PAGE_LOADED_SW].descriptor.cap =
SANE_CAP_SOFT_DETECT | SANE_CAP_HARD_SELECT | SANE_CAP_ADVANCED;
session->options[OPT_PAGE_LOADED_SW].value.b = 0;
/* calibration needed */
session->options[OPT_NEED_CALIBRATION_SW].descriptor.name =
"need-calibration";
session->options[OPT_NEED_CALIBRATION_SW].descriptor.title =
SANE_I18N ("Need calibration");
session->options[OPT_NEED_CALIBRATION_SW].descriptor.desc =
SANE_I18N ("The scanner needs calibration for the current settings");
session->options[OPT_NEED_CALIBRATION_SW].descriptor.type = SANE_TYPE_BOOL;
session->options[OPT_NEED_CALIBRATION_SW].descriptor.unit = SANE_UNIT_NONE;
session->options[OPT_NEED_CALIBRATION_SW].descriptor.cap =
SANE_CAP_SOFT_DETECT | SANE_CAP_HARD_SELECT | SANE_CAP_ADVANCED;
session->options[OPT_NEED_CALIBRATION_SW].value.b = 0;
/* button group */
session->options[OPT_BUTTON_GROUP].descriptor.name = "Buttons";
session->options[OPT_BUTTON_GROUP].descriptor.title = SANE_I18N ("Buttons");
session->options[OPT_BUTTON_GROUP].descriptor.desc = SANE_I18N ("Buttons");
session->options[OPT_BUTTON_GROUP].descriptor.type = SANE_TYPE_GROUP;
session->options[OPT_BUTTON_GROUP].descriptor.constraint_type =
SANE_CONSTRAINT_NONE;
/* calibrate button */
session->options[OPT_CALIBRATE].descriptor.name = "calibrate";
session->options[OPT_CALIBRATE].descriptor.title = SANE_I18N ("Calibrate");
session->options[OPT_CALIBRATE].descriptor.desc =
SANE_I18N ("Start calibration using special sheet");
session->options[OPT_CALIBRATE].descriptor.type = SANE_TYPE_BUTTON;
session->options[OPT_CALIBRATE].descriptor.unit = SANE_UNIT_NONE;
session->options[OPT_CALIBRATE].descriptor.cap =
SANE_CAP_SOFT_DETECT | SANE_CAP_SOFT_SELECT | SANE_CAP_ADVANCED |
SANE_CAP_AUTOMATIC;
session->options[OPT_CALIBRATE].value.b = 0;
/* clear calibration cache button */
session->options[OPT_CLEAR_CALIBRATION].descriptor.name = "clear";
session->options[OPT_CLEAR_CALIBRATION].descriptor.title =
SANE_I18N ("Clear calibration");
session->options[OPT_CLEAR_CALIBRATION].descriptor.desc =
SANE_I18N ("Clear calibration cache");
session->options[OPT_CLEAR_CALIBRATION].descriptor.type = SANE_TYPE_BUTTON;
session->options[OPT_CLEAR_CALIBRATION].descriptor.unit = SANE_UNIT_NONE;
session->options[OPT_CLEAR_CALIBRATION].descriptor.cap =
SANE_CAP_SOFT_DETECT | SANE_CAP_SOFT_SELECT | SANE_CAP_ADVANCED |
SANE_CAP_AUTOMATIC;
session->options[OPT_CLEAR_CALIBRATION].value.b = 0;
/* until work on calibration isfinished */
DISABLE (OPT_CALIBRATE);
DISABLE (OPT_CLEAR_CALIBRATION);
DBG (DBG_proc, "init_options: exit\n");
return SANE_STATUS_GOOD;
}
/** @brief physical probe of a device
* This function probes for a scanning device using the given name. If the
* device is managed, a model structure describing the device will be returned.
* @param devicename low level device to access to probe hardware
* @return NULL is the device is unsupported, or a model struct describing the
* device.
*/
P5_Model *
probe (const char *devicename)
{
int fd;
/* open parallel port device */
fd = open_pp (devicename);
if (fd < 0)
{
DBG (DBG_error, "probe: failed to open '%s' device!\n", devicename);
return NULL;
}
/* now try to connect to scanner */
if (connect (fd) != SANE_TRUE)
{
DBG (DBG_error, "probe: failed to connect!\n");
close_pp (fd);
return NULL;
}
/* set up for memory test */
write_reg (fd, REG1, 0x00);
write_reg (fd, REG7, 0x00);
write_reg (fd, REG0, 0x00);
write_reg (fd, REG1, 0x00);
write_reg (fd, REGF, 0x80);
if (memtest (fd, 0x0100) != SANE_TRUE)
{
disconnect (fd);
close_pp (fd);
DBG (DBG_error, "probe: memory test failed!\n");
return NULL;
}
else
{
DBG (DBG_info, "memtest() OK...\n");
}
write_reg (fd, REG7, 0x00);
/* check for document presence 0xC6: present, 0xC3 no document */
test_document (fd);
/* release device and parport for next uses */
disconnect (fd);
close_pp (fd);
/* for there is only one supported model, so we use hardcoded values */
DBG (DBG_proc, "probe: exit\n");
return &pagepartner_model;
}
/* vim: set sw=2 cino=>2se-1sn-1s{s^-1st0(0u0 smarttab expandtab: */
|