sane.ds: Added support for ICAP_UNITS.

dlls/sane.ds/capability.c

diff --git a/dlls/sane.ds/capability.c b/dlls/sane.ds/capability.c
index bbd0590..f8a300c 100644
--- a/dlls/sane.ds/capability.c
+++ b/dlls/sane.ds/capability.c
@@ -154,7 +154,7 @@
 {
     TW_ARRAY *a;
     static const UINT16 supported_caps[] = { CAP_SUPPORTEDCAPS, CAP_XFERCOUNT, CAP_UICONTROLLABLE,
-                    ICAP_XFERMECH, ICAP_PIXELTYPE, ICAP_BITDEPTH, ICAP_COMPRESSION, ICAP_PIXELFLAVOR,
+                    ICAP_XFERMECH, ICAP_PIXELTYPE, ICAP_UNITS, ICAP_BITDEPTH, ICAP_COMPRESSION, ICAP_PIXELFLAVOR,
                     ICAP_XRESOLUTION, ICAP_YRESOLUTION };
 
     pCapability->hContainer = GlobalAlloc (0, FIELD_OFFSET( TW_ARRAY, ItemList[sizeof(supported_caps)] ));
@@ -311,6 +311,49 @@
     return twCC;
 }
 
+/* ICAP_UNITS */
+static TW_UINT16 SANE_ICAPUnits (pTW_CAPABILITY pCapability, TW_UINT16 action)
+{
+    TW_UINT32 val;
+    TW_UINT16 twCC = TWCC_BADCAP;
+
+    TRACE("ICAP_UNITS\n");
+
+    switch (action)
+    {
+        case MSG_QUERYSUPPORT:
+            twCC = set_onevalue(pCapability, TWTY_INT32,
+                    TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET );
+            break;
+
+        case MSG_GET:
+            twCC = set_onevalue(pCapability, TWTY_UINT16, TWUN_INCHES);
+            break;
+
+        case MSG_SET:
+            twCC = msg_set(pCapability, &val);
+            if (twCC == TWCC_SUCCESS)
+            {
+                if  (val != TWUN_INCHES)
+                {
+                    ERR("Sane supports only SANE_UNIT_DPI\n");
+                    twCC = TWCC_BADVALUE;
+                }
+            }
+            break;
+
+        case MSG_GETDEFAULT:
+        case MSG_RESET:
+            /* .. fall through intentional .. */
+
+        case MSG_GETCURRENT:
+            twCC = set_onevalue(pCapability, TWTY_UINT16, TWUN_INCHES);
+            break;
+    }
+
+    return twCC;
+}
+
 /* ICAP_BITDEPTH */
 static TW_UINT16 SANE_ICAPBitDepth(pTW_CAPABILITY pCapability, TW_UINT16 action)
 {
@@ -581,6 +624,10 @@
             twCC = SANE_ICAPPixelType (pCapability, action);
             break;
 
+        case ICAP_UNITS:
+            twCC = SANE_ICAPUnits (pCapability, action);
+            break;
+
         case ICAP_BITDEPTH:
             twCC = SANE_ICAPBitDepth(pCapability, action);
             break;

dlls/twain_32/tests/dsm.c

diff --git a/dlls/twain_32/tests/dsm.c b/dlls/twain_32/tests/dsm.c
index 9e7dd8d..fb438ab 100644
--- a/dlls/twain_32/tests/dsm.c
+++ b/dlls/twain_32/tests/dsm.c
@@ -109,6 +109,9 @@
             TW_ONEVALUE *onev = (TW_ONEVALUE *) p;
             ok(onev->Item == orig_value || !(actual_support & TWQC_GETCURRENT), "MSG_GET of 0x%x returned 0x%x, expecting 0x%x\n",
                 pCapability->Cap, onev->Item, orig_value);
+            trace("MSG_GET of 0x%x returned val 0x%x, type %d\n", pCapability->Cap, onev->Item, onev->ItemType);
+            if (suggested_set_value)
+                *suggested_set_value = onev->Item;
         }
         else if (pCapability->ConType == TWON_ENUMERATION)
         {
@@ -473,8 +476,10 @@
         if (capabilities[ICAP_PIXELTYPE])
             test_onevalue_cap(appid, source, ICAP_PIXELTYPE, TWTY_UINT16,
                 TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET);
-        todo_wine
         ok(capabilities[ICAP_UNITS], "ICAP_UNITS not supported\n");
+        if (capabilities[ICAP_UNITS])
+            test_onevalue_cap(appid, source, ICAP_UNITS, TWTY_UINT16,
+                TWQC_GET | TWQC_SET | TWQC_GETDEFAULT | TWQC_GETCURRENT | TWQC_RESET);
         ok(capabilities[ICAP_XFERMECH], "ICAP_XFERMECH not supported\n");
         if (capabilities[ICAP_XFERMECH])
             test_onevalue_cap(appid, source, ICAP_XFERMECH, TWTY_UINT16,