PCP(9.1) PCP(9.1)
NAME
pcp - copy pictures
SYNOPSIS
fb/pcp [ -wx0 y0 x1 y1 ] [ -ox y ] [ -ttype ] [ -cchannels ] [ -Cchannels ] [ -mcolormap ] [ -M ] [ input [ output ] ]
DESCRIPTION
Pcp copies the input picture (default standard input) to the output file (default standard output). Options control the attributes and
content of the output picture.
-w x0 y0 x1 y1
causes only the given window of the input picture to be copied. By default the whole picture is copied.
-o x y causes the output picture's WINDOW= attribute to be translated by adding (x,y) to the input window coordinates.
-t type
sets the TYPE= attribute of the output file. The default is to use the input file's type.
-c channels
causes only the given channels of the input picture to be copied. The default is to copy all channels. If channels not present in
the input picture are specified, they are computed in the ``most plausible'' way. For example, a missing alpha channel is set to
255, and an m channel will be synthesized from rgb channels by computing NTSC luminance. A 0 in channels causes a zero channel to
be written.
-C channels
sets the output CHAN= attribute. Channels must be the same length as the selected channels of the input picture.
-m colormap
attaches the given color map to the output.
-M elides the color map from the output.
SOURCE
/sys/src/fb/pcp.c
SEE ALSO
picfile(9.6), cmap(9.6)
PCP(9.1)
Check Out this Related Man Page
Tcl_GetStdChannel(3) Tcl Library Procedures Tcl_GetStdChannel(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_GetStdChannel, Tcl_SetStdChannel - procedures for retrieving and replacing the standard channels
SYNOPSIS
#include <tcl.h>
Tcl_Channel
Tcl_GetStdChannel(type)
Tcl_SetStdChannel(channel, type)
ARGUMENTS
int type (in) The identifier for the standard channel to retrieve or modify. Must be one of TCL_STDIN, TCL_STDOUT, or
TCL_STDERR.
Tcl_Channel channel (in) The channel to use as the new value for the specified standard channel.
_________________________________________________________________DESCRIPTION
Tcl defines three special channels that are used by various I/O related commands if no other channels are specified. The standard input
channel has a channel name of stdin and is used by read and gets. The standard output channel is named stdout and is used by puts. The
standard error channel is named stderr and is used for reporting errors. In addition, the standard channels are inherited by any child
processes created using exec or open in the absence of any other redirections.
The standard channels are actually aliases for other normal channels. The current channel associated with a standard channel can be
retrieved by calling Tcl_GetStdChannel with one of TCL_STDIN, TCL_STDOUT, or TCL_STDERR as the type. The return value will be a valid
channel, or NULL.
A new channel can be set for the standard channel specified by type by calling Tcl_SetStdChannel with a new channel or NULL in the channel
argument. If the specified channel is closed by a later call to Tcl_Close, then the corresponding standard channel will automatically be
set to NULL.
If Tcl_GetStdChannel is called before Tcl_SetStdChannel, Tcl will construct a new channel to wrap the appropriate platform-specific stan-
dard file handle. If Tcl_SetStdChannel is called before Tcl_GetStdChannel, then the default channel will not be created.
If one of the standard channels is set to NULL, either by calling Tcl_SetStdChannel with a NULL channel argument, or by calling Tcl_Close
on the channel, then the next call to Tcl_CreateChannel will automatically set the standard channel with the newly created channel. If
more than one standard channel is NULL, then the standard channels will be assigned starting with standard input, followed by standard out-
put, with standard error being last.
See Tcl_StandardChannels for a general treatise about standard channels and the behaviour of the Tcl library with regard to them.
SEE ALSO Tcl_Close(3), Tcl_CreateChannel(3), Tcl_Main(3), tclsh(1)KEYWORDS
standard channel, standard input, standard output, standard error
Tcl 7.5 Tcl_GetStdChannel(3)