dlls/sane.ds/options.c

   1 /*
   2  * Copyright 2009 Jeremy White <jwhite@codeweavers.com> for CodeWeavers
   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 #include "config.h"
  20
  21 #include <stdlib.h>
  22 #include "twain.h"
  23 #include "sane_i.h"
  24 #include "wine/debug.h"
  25
  26 #ifdef SONAME_LIBSANE
  27 static SANE_Status sane_find_option(SANE_Handle h, const char *option_name,
  28         const SANE_Option_Descriptor **opt_p, int *optno, SANE_Value_Type type)
  29 {
  30     SANE_Status rc;
  31     SANE_Int optcount;
  32     const SANE_Option_Descriptor *opt;
  33     int i;
  34
  35     /* Debian, in 32_net_backend_standard_fix.dpatch,
  36      *  forces a frontend (that's us) to reload options
  37      *  manually by invoking get_option_descriptor. */
  38     opt = psane_get_option_descriptor(h, 0);
  39     if (! opt)
  40         return SANE_STATUS_EOF;
  41
  42     rc = psane_control_option(h, 0, SANE_ACTION_GET_VALUE, &optcount, NULL);
  43     if (rc != SANE_STATUS_GOOD)
  44         return rc;
  45
  46     for (i = 1; i < optcount; i++)
  47     {
  48         opt = psane_get_option_descriptor(h, i);
  49         if (opt && (opt->name && strcmp(opt->name, option_name) == 0) &&
  50                opt->type == type)
  51         {
  52             *opt_p = opt;
  53             *optno = i;
  54             return SANE_STATUS_GOOD;
  55         }
  56     }
  57     return SANE_STATUS_EOF;
  58 }
  59
  60 SANE_Status sane_option_get_int(SANE_Handle h, const char *option_name, SANE_Int *val)
  61 {
  62     SANE_Status rc;
  63     int optno;
  64     const SANE_Option_Descriptor *opt;
  65
  66     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_INT);
  67     if (rc != SANE_STATUS_GOOD)
  68         return rc;
  69
  70     return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, val, NULL);
  71 }
  72
  73 SANE_Status sane_option_set_int(SANE_Handle h, const char *option_name, SANE_Int val, SANE_Int *status)
  74 {
  75     SANE_Status rc;
  76     int optno;
  77     const SANE_Option_Descriptor *opt;
  78
  79     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_INT);
  80     if (rc != SANE_STATUS_GOOD)
  81         return rc;
  82
  83     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) &val, status);
  84 }
  85
  86 SANE_Status sane_option_get_bool(SANE_Handle h, const char *option_name, SANE_Bool *val, SANE_Int *status)
  87 {
  88     SANE_Status rc;
  89     int optno;
  90     const SANE_Option_Descriptor *opt;
  91
  92     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_BOOL);
  93     if (rc != SANE_STATUS_GOOD)
  94         return rc;
  95
  96     return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, (void *) val, status);
  97 }
  98
  99 SANE_Status sane_option_set_bool(SANE_Handle h, const char *option_name, SANE_Bool val, SANE_Int *status)
 100 {
 101     SANE_Status rc;
 102     int optno;
 103     const SANE_Option_Descriptor *opt;
 104
 105     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_BOOL);
 106     if (rc != SANE_STATUS_GOOD)
 107         return rc;
 108
 109     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) &val, status);
 110 }
 111
 112 SANE_Status sane_option_set_fixed(SANE_Handle h, const char *option_name, SANE_Fixed val, SANE_Int *status)
 113 {
 114     SANE_Status rc;
 115     int optno;
 116     const SANE_Option_Descriptor *opt;
 117
 118     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_FIXED);
 119     if (rc != SANE_STATUS_GOOD)
 120         return rc;
 121
 122     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) &val, status);
 123 }
 124
 125 SANE_Status sane_option_get_str(SANE_Handle h, const char *option_name, SANE_String val, size_t len, SANE_Int *status)
 126 {
 127     SANE_Status rc;
 128     int optno;
 129     const SANE_Option_Descriptor *opt;
 130
 131     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_STRING);
 132     if (rc != SANE_STATUS_GOOD)
 133         return rc;
 134
 135     if (opt->size < len)
 136         return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, (void *) val, status);
 137     else
 138         return SANE_STATUS_NO_MEM;
 139 }
 140
 141 /* Important:  SANE has the side effect of overwriting val with the returned value */
 142 SANE_Status sane_option_set_str(SANE_Handle h, const char *option_name, SANE_String val, SANE_Int *status)
 143 {
 144     SANE_Status rc;
 145     int optno;
 146     const SANE_Option_Descriptor *opt;
 147
 148     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_STRING);
 149     if (rc != SANE_STATUS_GOOD)
 150         return rc;
 151
 152     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) val, status);
 153 }
 154
 155 SANE_Status sane_option_probe_resolution(SANE_Handle h, const char *option_name, SANE_Int *minval, SANE_Int *maxval, SANE_Int *quant)
 156 {
 157     SANE_Status rc;
 158     int optno;
 159     const SANE_Option_Descriptor *opt;
 160
 161     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_INT);
 162     if (rc != SANE_STATUS_GOOD)
 163         return rc;
 164
 165     if (opt->constraint_type != SANE_CONSTRAINT_RANGE)
 166         return SANE_STATUS_UNSUPPORTED;
 167
 168     *minval = opt->constraint.range->min;
 169     *maxval = opt->constraint.range->max;
 170     *quant = opt->constraint.range->quant;
 171
 172     return rc;
 173 }
 174
 175 SANE_Status sane_option_probe_mode(SANE_Handle h, SANE_String_Const **choices, char *current, int current_size)
 176 {
 177     SANE_Status rc;
 178     int optno;
 179     const SANE_Option_Descriptor *opt;
 180     rc = sane_find_option(h, "mode", &opt, &optno, SANE_TYPE_STRING);
 181     if (rc != SANE_STATUS_GOOD)
 182         return rc;
 183
 184     if (choices && opt->constraint_type == SANE_CONSTRAINT_STRING_LIST)
 185         *choices = (SANE_String_Const *) opt->constraint.string_list;
 186
 187     if (opt->size < current_size)
 188         return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, current, NULL);
 189     else
 190         return SANE_STATUS_NO_MEM;
 191
 192 }
 193
 194 SANE_Status sane_option_probe_scan_area(SANE_Handle h, const char *option_name, SANE_Fixed *val,
 195                                         SANE_Unit *unit, SANE_Fixed *min, SANE_Fixed *max, SANE_Fixed *quant)
 196 {
 197     SANE_Status rc;
 198     int optno;
 199     const SANE_Option_Descriptor *opt;
 200
 201     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_FIXED);
 202     if (rc != SANE_STATUS_GOOD)
 203         return rc;
 204
 205     if (unit)
 206         *unit = opt->unit;
 207     if (min)
 208         *min = opt->constraint.range->min;
 209     if (max)
 210         *max = opt->constraint.range->max;
 211     if (quant)
 212         *quant = opt->constraint.range->quant;
 213
 214     if (val)
 215         rc = psane_control_option(h, optno, SANE_ACTION_GET_VALUE, val, NULL);
 216
 217     return rc;
 218 }
 219
 220 TW_UINT16 sane_status_to_twcc(SANE_Status rc)
 221 {
 222     switch (rc)
 223     {
 224         case SANE_STATUS_GOOD:
 225             return TWCC_SUCCESS;
 226         case SANE_STATUS_UNSUPPORTED:
 227             return TWCC_CAPUNSUPPORTED;
 228         case SANE_STATUS_JAMMED:
 229             return TWCC_PAPERJAM;
 230         case SANE_STATUS_NO_MEM:
 231             return TWCC_LOWMEMORY;
 232         case SANE_STATUS_ACCESS_DENIED:
 233             return TWCC_DENIED;
 234
 235         case SANE_STATUS_IO_ERROR:
 236         case SANE_STATUS_NO_DOCS:
 237         case SANE_STATUS_COVER_OPEN:
 238         case SANE_STATUS_EOF:
 239         case SANE_STATUS_INVAL:
 240         case SANE_STATUS_CANCELLED:
 241         case SANE_STATUS_DEVICE_BUSY:
 242         default:
 243             return TWCC_BUMMER;
 244     }
 245 }
 246 static void convert_double_fix32(double d, TW_FIX32 *fix32)
 247 {
 248     TW_INT32 value = (TW_INT32) (d * 65536.0 + 0.5);
 249     fix32->Whole = value >> 16;
 250     fix32->Frac = value & 0x0000ffffL;
 251 }
 252
 253 BOOL convert_sane_res_to_twain(double sane_res, SANE_Unit unit, TW_FIX32 *twain_res, TW_UINT16 twtype)
 254 {
 255     if (unit != SANE_UNIT_MM)
 256         return FALSE;
 257
 258     if (twtype != TWUN_INCHES)
 259         return FALSE;
 260
 261     convert_double_fix32((sane_res / 10.0) / 2.54, twain_res);
 262
 263     return TRUE;
 264 }
 265 #endif