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Merge branch 'scanimage-output-path' into 'master' 

scanimage: Allow specification of the output path via option

See merge request sane-project/backends!46
merge-requests/65/head
Olaf Meeuwissen 2019-05-12 02:36:36 +00:00
rodzic 4df63ef548 ee6d6da339
commit ae871333ef
2 zmienionych plików z 125 dodań i 12 usunięć
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17
doc/scanimage.man
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@ -24,6 +24,7 @@ scanimage \- scan an image
.RB [ \-\-batch\-double ]
.RB [ \-\-accept\-md5\-only ]
.RB [ \-p | \-\-progress ]
.RB [ \-o | \-\-output-file ]
.RB [ \-n | \-\-dont\-scan ]
.RB [ \-T | \-\-test ]
.RB [ \-A | \-\-all-options ]
@ -101,7 +102,8 @@ will attempt to open the first available device.
The
.B \-\-format
.I format
option selects how image data is written to standard output.
option selects how image data is written to standard output or the file specified by
the \-\-output\-file option.
.I format
can be
.BR pnm ,
@ -111,7 +113,7 @@ or
.BR jpeg .
If
.B \-\-format
is not used, PNM is written.
is not specified, PNM is written by default.
.PP
The
.B \-i
@ -169,6 +171,7 @@ to. Each page is written out to a single file. If
.I format
is not specified, the default of out%d.pnm (or out%d.tif for \-\-format tiff,
out%d.png for \-\-format png or out%d.jpg for \-\- format jpeg) will be used.
This option is incompatible with the \-\-output\-path option.
.I format
is given as a printf style string with one integer parameter.
.B \-\-batch\-start
@ -215,6 +218,16 @@ already been received by
(in percent).
.PP
The
.B \-o
or
.B \-\-output\-file
option requests that
.B scanimage
saves the scanning output to the given path. This option is incompatible with the
\-\-batch option. The program will try to guess \-\-format from the file name.
If that is not possible, it will print an error message and exit.
.PP
The
.B \-n
or
.B \-\-dont\-scan

120
frontend/scanimage.c
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@ -93,6 +93,7 @@ static struct option basic_options[] = {
{"help", no_argument, NULL, 'h'},
{"verbose", no_argument, NULL, 'v'},
{"progress", no_argument, NULL, 'p'},
{"output-file", required_argument, NULL, 'o'},
{"test", no_argument, NULL, 'T'},
{"all-options", no_argument, NULL, 'A'},
{"version", no_argument, NULL, 'V'},
@ -111,12 +112,13 @@ static struct option basic_options[] = {
{0, 0, NULL, 0}
};
#define OUTPUT_PNM 0
#define OUTPUT_TIFF 1
#define OUTPUT_PNG 2
#define OUTPUT_JPEG 3
#define OUTPUT_UNKNOWN 0
#define OUTPUT_PNM 1
#define OUTPUT_TIFF 2
#define OUTPUT_PNG 3
#define OUTPUT_JPEG 4
#define BASE_OPTSTRING "d:hi:Lf:B::nvVTAbp"
#define BASE_OPTSTRING "d:hi:Lf:o:B::nvVTAbp"
#define STRIP_HEIGHT 256 /* # lines we increment image height */
static struct option *all_options;
@ -125,9 +127,10 @@ static int *option_number;
static SANE_Handle device;
static int verbose;
static int progress = 0;
static const char* output_file = NULL;
static int test;
static int all;
static int output_format = OUTPUT_PNM;
static int output_format = OUTPUT_UNKNOWN;
static int help;
static int dont_scan = 0;
static const char *prog_name;
@ -1968,6 +1971,43 @@ static void print_options(SANE_Device * device, SANE_Int num_dev_options, SANE_B
fputc ('\n', stdout);
}
static int guess_output_format(const char* output_file)
{
if (output_file == NULL)
{
printf("Output format is not set, using pnm as a default.\n");
return OUTPUT_PNM;
}
// if the user passes us a path with a known extension then he won't be surprised if we figure
// out correct --format option. No warning is necessary in that case.
const char* extension = strrchr(output_file, '.');
if (extension != NULL)
{
struct {
const char* extension;
int output_format;
} formats[] = {
{ ".pnm", OUTPUT_PNM },
{ ".png", OUTPUT_PNG },
{ ".jpg", OUTPUT_JPEG },
{ ".jpeg", OUTPUT_JPEG },
{ ".tiff", OUTPUT_TIFF },
{ ".tif", OUTPUT_TIFF }
};
for (unsigned i = 0; i < sizeof(formats) / sizeof(formats[0]); ++i)
{
if (strcmp(extension, formats[i].extension) == 0)
return formats[i].output_format;
}
}
// it would be very confusing if user makes a typo in the filename and the output format changes.
// This is most likely not what the user wanted.
fprintf(stderr, "Could not guess output format from the given path and no --format given.\n");
exit(1);
}
int
main (int argc, char **argv)
{
@ -2033,6 +2073,9 @@ main (int argc, char **argv)
case 'p':
progress = 1;
break;
case 'o':
output_file = optarg;
break;
case 'B':
if (optarg)
buffer_size = 1024 * atoi(optarg);
@ -2088,8 +2131,23 @@ main (int argc, char **argv)
exit(1);
#endif
}
else
output_format = OUTPUT_PNM;
else if (strcmp (optarg, "pnm") == 0)
{
output_format = OUTPUT_PNM;
}
else
{
fprintf(stderr, "Unknown output image format '%s'.\n", optarg);
fprintf(stderr, "Supported formats: pnm, tiff");
#ifdef HAVE_LIBPNG
fprintf(stderr, ", png");
#endif
#ifdef HAVE_LIBJPEG
fprintf(stderr, ", jpeg");
#endif
fprintf(stderr, ".\n");
exit(1);
}
break;
case OPTION_MD5:
accept_only_md5_auth = 1;
@ -2235,7 +2293,8 @@ Parameters are separated by a blank from single-character options (e.g.\n\
%%m (model), %%t (type), %%i (index number), and\n\
%%n (newline)\n\
-b, --batch[=FORMAT] working in batch mode, FORMAT is `out%%d.pnm' `out%%d.tif'\n\
`out%%d.png' or `out%%d.jpg' by default depending on --format\n");
`out%%d.png' or `out%%d.jpg' by default depending on --format\n\
This option is incompatible with --output-file.");
printf ("\
--batch-start=# page number to start naming files with\n\
--batch-count=# how many pages to scan in batch mode\n\
@ -2247,6 +2306,8 @@ Parameters are separated by a blank from single-character options (e.g.\n\
printf ("\
--accept-md5-only only accept authorization requests using md5\n\
-p, --progress print progress messages\n\
-o, --output-file=PATH save output to the given file instead of stdout.\n\
This option is incompatible with --batch.\n\
-n, --dont-scan only set options, don't actually scan\n\
-T, --test test backend thoroughly\n\
-A, --all-options list all available backend options\n\
@ -2257,6 +2318,15 @@ Parameters are separated by a blank from single-character options (e.g.\n\
-V, --version print version information\n");
}
if (batch && output_file != NULL)
{
fprintf(stderr, "--batch and --output-file can't be used together.\n");
exit(1);
}
if (output_format == OUTPUT_UNKNOWN)
output_format = guess_output_format(output_file);
if (!devname)
{
/* If no device name was specified explicitly, we look at the
@ -2389,6 +2459,7 @@ Parameters are separated by a blank from single-character options (e.g.\n\
case 'd':
case 'h':
case 'p':
case 'o':
case 'v':
case 'V':
case 'T':
@ -2535,7 +2606,19 @@ List of available devices:", prog_name);
}
if (!batch)
ofp = stdout;
{
ofp = stdout;
if (output_file != NULL)
{
ofp = fopen(output_file, "w");
if (ofp == NULL)
{
fprintf(stderr, "%s: could not open input file '%s', "
"exiting\n", prog_name, output_file);
scanimage_exit(1);
}
}
}
if (batch)
{
@ -2662,6 +2745,14 @@ List of available devices:", prog_name);
}
}
}
else
{
if (output_file && ofp)
{
fclose(ofp);
ofp = NULL;
}
}
break;
default:
if (batch)
@ -2673,6 +2764,15 @@ List of available devices:", prog_name);
}
unlink (part_path);
}
else
{
if (output_file && ofp)
{
fclose(ofp);
ofp = NULL;
}
unlink (output_file);
}
break;
} /* switch */
n += batch_increment;