kopia lustrzana https://gitlab.com/sane-project/backends
93 wiersze
3.1 KiB
Groff
93 wiersze
3.1 KiB
Groff
.TH sane-qcam 5 "25 October 1997" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
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.IX sane-qcam
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.SH NAME
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sane-qcam \- SANE backend for Connectix QuickCam cameras
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.SH DESCRIPTION
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The
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.B sane-qcam
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library implements a SANE (Scanner Access Now Easy) backend that
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provides access Connectix QuickCam cameras.
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.SH "DEVICE NAMES"
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This backend expects device names of the form:
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.PP
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.RS
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.I port
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.RE
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.PP
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Where
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.I port
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is the I/O port address at which the device resides. This address is
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normally specified in hexadecimal using C syntax (e.g., 0x37b) and may
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be prefixed with the letter "u" (e.g., u0x37b) to force the backend to
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access the camera in uni-directional mode.
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.SH CONFIGURATION
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The contents of the
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.I qcam.conf
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file is a list port addresses that may be connected to a
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Connectix QuickCam. Empty lines and everything starting from a hash
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mark (#) up to the end of a line are ignored. A sample configuration
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file is shown below:
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.PP
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.RS
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0x37b # /dev/lp0
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.br
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0x378 # /dev/lp1
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.br
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u0x278 # /dev/lp2 forced in uni-directional mode
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.br
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0x3bc # /dev/lp0 (alternate address)
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.RE
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.PP
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In general, it is safest to list only the port addresses that really
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correspond to a QuickCam. For example, if one of the listed addresses
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actually connect to a printer, then starting up this backend will
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cause the printer to perform a device reset (which is generally
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undesirable).
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.SH FILES
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.TP
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.I @CONFIGDIR@/qcam.conf
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The backend configuration file (see also description of
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.B SANE_CONFIG_DIR
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below).
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.TP
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.I @LIBDIR@/libsane-qcam.a
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The static library implementing this backend.
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.TP
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.I @LIBDIR@/libsane-qcam.so
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The shared library implementing this backend (present on systems that
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support dynamic loading).
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.SH ENVIRONMENT
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.TP
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.B SANE_CONFIG_DIR
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This environment variable specifies the list of directories that may
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contain the configuration file. Under UNIX, the directories are
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separated by a colon (`:'), under OS/2, they are separated by a
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semi-colon (`;'). If this variable is not set, the configuration file
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is searched in two default directories: first, the current working
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directory (".") and then in @CONFIGDIR@. If the value of the
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environment variable ends with the directory separator character, then
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the default directories are searched after the explicitly specified
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directories. For example, setting
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.B SANE_CONFIG_DIR
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to "/tmp/config:" would result in directories "tmp/config", ".", and
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"@CONFIGDIR@" being searched (in this order).
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.TP
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.B SANE_DEBUG_QCAM
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend. E.g.,
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a value of 128 requests all debug output to be printed. Smaller
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levels reduce verbosity.
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.SH AUTHOR
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David Mosberger
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.SH BUGS
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Support is currently limited to the color version of the QuickCam.
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The black-and-white camera is starting to work too, but I don't
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believe it works in all cases yet. Reportedly, acquiring images of
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certain sizes work fine, but others result in shifted images (sounds
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like a problem due to byte-padding).
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.PP
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The program needs root-priviledges since it needs to be able to access
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the camera's I/O ports.
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.SH SEE ALSO
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sane(7)
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