man/man3/CanvPsY.3 - toolchains/skids - Git at Google

 '\"
 '\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
 '\"
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\"
 '\" RCS: @(#) $Id: CanvPsY.3,v 1.5 2000/07/25 21:14:34 jenglish Exp $
 '\"
 '\" The definitions below are for supplemental macros used in Tcl/Tk
 '\" manual entries.
 '\"
 '\" .AP type name in/out ?indent?
 '\"	Start paragraph describing an argument to a library procedure.
 '\"	type is type of argument (int, etc.), in/out is either "in", "out",
 '\"	or "in/out" to describe whether procedure reads or modifies arg,
 '\"	and indent is equivalent to second arg of .IP (shouldn't ever be
 '\"	needed;  use .AS below instead)
 '\"
 '\" .AS ?type? ?name?
 '\"	Give maximum sizes of arguments for setting tab stops.  Type and
 '\"	name are examples of largest possible arguments that will be passed
 '\"	to .AP later.  If args are omitted, default tab stops are used.
 '\"
 '\" .BS
 '\"	Start box enclosure.  From here until next .BE, everything will be
 '\"	enclosed in one large box.
 '\"
 '\" .BE
 '\"	End of box enclosure.
 '\"
 '\" .CS
 '\"	Begin code excerpt.
 '\"
 '\" .CE
 '\"	End code excerpt.
 '\"
 '\" .VS ?version? ?br?
 '\"	Begin vertical sidebar, for use in marking newly-changed parts
 '\"	of man pages.  The first argument is ignored and used for recording
 '\"	the version when the .VS was added, so that the sidebars can be
 '\"	found and removed when they reach a certain age.  If another argument
 '\"	is present, then a line break is forced before starting the sidebar.
 '\"
 '\" .VE
 '\"	End of vertical sidebar.
 '\"
 '\" .DS
 '\"	Begin an indented unfilled display.
 '\"
 '\" .DE
 '\"	End of indented unfilled display.
 '\"
 '\" .SO
 '\"	Start of list of standard options for a Tk widget.  The
 '\"	options follow on successive lines, in four columns separated
 '\"	by tabs.
 '\"
 '\" .SE
 '\"	End of list of standard options for a Tk widget.
 '\"
 '\" .OP cmdName dbName dbClass
 '\"	Start of description of a specific option.  cmdName gives the
 '\"	option's name as specified in the class command, dbName gives
 '\"	the option's name in the option database, and dbClass gives
 '\"	the option's class in the option database.
 '\"
 '\" .UL arg1 arg2
 '\"	Print arg1 underlined, then print arg2 normally.
 '\"
 '\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
 '\"
 '\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
 .if t .wh -1.3i ^B
 .nr ^l \n(.l
 .ad b
 '\"	# Start an argument description
 .de AP
 .ie !"\\$4"" .TP \\$4
 .el \{\
 .   ie !"\\$2"" .TP \\n()Cu
 .   el          .TP 15
 .\}
 .ta \\n()Au \\n()Bu
 .ie !"\\$3"" \{\
 \&\\$1	\\fI\\$2\\fP	(\\$3)
 .\".b
 .\}
 .el \{\
 .br
 .ie !"\\$2"" \{\
 \&\\$1	\\fI\\$2\\fP
 .\}
 .el \{\
 \&\\fI\\$1\\fP
 .\}
 .\}
 ..
 '\"	# define tabbing values for .AP
 .de AS
 .nr )A 10n
 .if !"\\$1"" .nr )A \\w'\\$1'u+3n
 .nr )B \\n()Au+15n
 .\"
 .if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
 .nr )C \\n()Bu+\\w'(in/out)'u+2n
 ..
 .AS Tcl_Interp Tcl_CreateInterp in/out
 '\"	# BS - start boxed text
 '\"	# ^y = starting y location
 '\"	# ^b = 1
 .de BS
 .br
 .mk ^y
 .nr ^b 1u
 .if n .nf
 .if n .ti 0
 .if n \l'\\n(.lu\(ul'
 .if n .fi
 ..
 '\"	# BE - end boxed text (draw box now)
 .de BE
 .nf
 .ti 0
 .mk ^t
 .ie n \l'\\n(^lu\(ul'
 .el \{\
 .\"	Draw four-sided box normally, but don't draw top of
 .\"	box if the box started on an earlier page.
 .ie !\\n(^b-1 \{\
 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
 .\}
 .el \}\
 \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
 .\}
 .\}
 .fi
 .br
 .nr ^b 0
 ..
 '\"	# VS - start vertical sidebar
 '\"	# ^Y = starting y location
 '\"	# ^v = 1 (for troff;  for nroff this doesn't matter)
 .de VS
 .if !"\\$2"" .br
 .mk ^Y
 .ie n 'mc \s12\(br\s0
 .el .nr ^v 1u
 ..
 '\"	# VE - end of vertical sidebar
 .de VE
 .ie n 'mc
 .el \{\
 .ev 2
 .nf
 .ti 0
 .mk ^t
 \h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n'
 .sp -1
 .fi
 .ev
 .\}
 .nr ^v 0
 ..
 '\"	# Special macro to handle page bottom:  finish off current
 '\"	# box/sidebar if in box/sidebar mode, then invoked standard
 '\"	# page bottom macro.
 .de ^B
 .ev 2
 'ti 0
 'nf
 .mk ^t
 .if \\n(^b \{\
 .\"	Draw three-sided box if this is the box's first page,
 .\"	draw two sides but no top otherwise.
 .ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
 .el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
 .\}
 .if \\n(^v \{\
 .nr ^x \\n(^tu+1v-\\n(^Yu
 \kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
 .\}
 .bp
 'fi
 .ev
 .if \\n(^b \{\
 .mk ^y
 .nr ^b 2
 .\}
 .if \\n(^v \{\
 .mk ^Y
 .\}
 ..
 '\"	# DS - begin display
 .de DS
 .RS
 .nf
 .sp
 ..
 '\"	# DE - end display
 .de DE
 .fi
 .RE
 .sp
 ..
 '\"	# SO - start of list of standard options
 .de SO
 .SH "STANDARD OPTIONS"
 .LP
 .nf
 .ta 5.5c 11c
 .ft B
 ..
 '\"	# SE - end of list of standard options
 .de SE
 .fi
 .ft R
 .LP
 See the \\fBoptions\\fR manual entry for details on the standard options.
 ..
 '\"	# OP - start of full description for a single option
 .de OP
 .LP
 .nf
 .ta 4c
 Command-Line Name:	\\fB\\$1\\fR
 Database Name:	\\fB\\$2\\fR
 Database Class:	\\fB\\$3\\fR
 .fi
 .IP
 ..
 '\"	# CS - begin code excerpt
 .de CS
 .RS
 .nf
 .ta .25i .5i .75i 1i
 ..
 '\"	# CE - end code excerpt
 .de CE
 .fi
 .RE
 ..
 .de UL
 \\$1\l'|0\(ul'\\$2
 ..
 .TH Tk_CanvasPs 3 4.0 Tk "Tk Library Procedures"
 .BS
 .SH NAME
 Tk_CanvasPsY, Tk_CanvasPsBitmap, Tk_CanvasPsColor, Tk_CanvasPsFont, Tk_CanvasPsPath, Tk_CanvasPsStipple \- utility procedures for generating Postscript for canvases
 .SH SYNOPSIS
 .nf
 \fB#include <tk.h>\fR
 .sp
 double
 \fBTk_CanvasPsY\fR(\fIcanvas, canvasY\fR)
 .sp
 int
 \fBTk_CanvasPsBitmap\fR(\fIinterp, canvas, bitmap, x, y, width, height\fR)
 .sp
 int
 \fBTk_CanvasPsColor\fR(\fIinterp, canvas, colorPtr\fR)
 .sp
 int
 \fBTk_CanvasPsFont\fR(\fIinterp, canvas, tkFont\fR)
 .sp
 \fBTk_CanvasPsPath\fR(\fIinterp, canvas, coordPtr, numPoints\fR)
 .sp
 int
 \fBTk_CanvasPsStipple\fR(\fIinterp, canvas, bitmap\fR)
 .SH ARGUMENTS
 .AS "unsigned int" "numPoints"
 .AP Tk_Canvas canvas in
 A token that identifies a canvas widget for which Postscript is
 being generated.
 .AP double canvasY in
 Y-coordinate in the space of the canvas.
 .AP Tcl_Interp *interp in/out
 A Tcl interpreter;  Postscript is appended to its result, or the
 result may be replaced with an error message.
 .AP Pixmap bitmap in
 Bitmap to use for generating Postscript.
 .AP int x in
 X-coordinate within \fIbitmap\fR of left edge of region to output.
 .AP int y in
 Y-coordinate within \fIbitmap\fR of top edge of region to output.
 .AP "int" width in
 Width of region of bitmap to output, in pixels.
 .AP "int" height in
 Height of region of bitmap to output, in pixels.
 .AP XColor *colorPtr in
 Information about color value to set in Postscript.
 .AP Tk_Font tkFont in
 Font for which Postscript is to be generated.
 .AP double *coordPtr in
 Pointer to an array of coordinates for one or more
 points specified in canvas coordinates.
 The order of values in \fIcoordPtr\fR is x1, y1, x2, y2, x3, y3,
 and so on.
 .AP int numPoints in
 Number of points at \fIcoordPtr\fR.
 .BE

 .SH DESCRIPTION
 .PP
 These procedures are called by canvas type managers to carry out
 common functions related to generating Postscript.
 Most of the procedures take a \fIcanvas\fR argument, which
 refers to a canvas widget for which Postscript is being
 generated.
 .PP
 \fBTk_CanvasPsY\fR takes as argument a y-coordinate in the space of
 a canvas and returns the value that should be used for that point
 in the Postscript currently being generated for \fIcanvas\fR.
 Y coordinates require transformation because Postscript uses an
 origin at the lower-left corner whereas X uses an origin at the
 upper-left corner.
 Canvas x coordinates can be used directly in Postscript without
 transformation.
 .PP
 \fBTk_CanvasPsBitmap\fR generates Postscript to describe a region
 of a bitmap.
 The Postscript is generated in proper image data format for Postscript,
 i.e., as data between angle brackets, one bit per pixel.
 The Postscript is appended to \fIinterp->result\fR and TCL_OK is returned
 unless an error occurs, in which case TCL_ERROR is returned and
 \fIinterp->result\fR is overwritten with an error message.
 .PP
 \fBTk_CanvasPsColor\fR generates Postscript to set the current color
 to correspond to its \fIcolorPtr\fR argument, taking into account any
 color map specified in the \fBpostscript\fR command.
 It appends the Postscript to \fIinterp->result\fR and returns
 TCL_OK unless an error occurs, in which case TCL_ERROR is returned and
 \fIinterp->result\fR is overwritten with an error message.
 .PP
 \fBTk_CanvasPsFont\fR generates Postscript that sets the current font
 to match \fItkFont\fR as closely as possible.
 \fBTk_CanvasPsFont\fR takes into account any font map specified
 in the \fBpostscript\fR command, and it does
 the best it can at mapping X fonts to Postscript fonts.
 It appends the Postscript to \fIinterp->result\fR and returns TCL_OK
 unless an error occurs, in which case TCL_ERROR is returned and
 \fIinterp->result\fR is overwritten with an error message.
 .PP
 \fBTk_CanvasPsPath\fR generates Postscript to set the current path
 to the set of points given by \fIcoordPtr\fR and \fInumPoints\fR.
 It appends the resulting Postscript to \fIinterp->result\fR.
 .PP
 \fBTk_CanvasPsStipple\fR generates Postscript that will fill the
 current path in stippled fashion.
 It uses \fIbitmap\fR as the stipple pattern and the current Postscript
 color;  ones in the stipple bitmap are drawn in the current color, and
 zeroes are not drawn at all.
 The Postscript is appended to \fIinterp->result\fR and TCL_OK is
 returned, unless an error occurs, in which case TCL_ERROR is returned and
 \fIinterp->result\fR is overwritten with an error message.

 .SH KEYWORDS
 bitmap, canvas, color, font, path, Postscript, stipple
	'\"
	'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
	'\"
	'\" See the file "license.terms" for information on usage and redistribution
	'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
	'\"
	'\" RCS: @(#) $Id: CanvPsY.3,v 1.5 2000/07/25 21:14:34 jenglish Exp $
	'\"
	'\" The definitions below are for supplemental macros used in Tcl/Tk
	'\" manual entries.
	'\"
	'\" .AP type name in/out ?indent?
	'\" Start paragraph describing an argument to a library procedure.
	'\" type is type of argument (int, etc.), in/out is either "in", "out",
	'\" or "in/out" to describe whether procedure reads or modifies arg,
	'\" and indent is equivalent to second arg of .IP (shouldn't ever be
	'\" needed; use .AS below instead)
	'\"
	'\" .AS ?type? ?name?
	'\" Give maximum sizes of arguments for setting tab stops. Type and
	'\" name are examples of largest possible arguments that will be passed
	'\" to .AP later. If args are omitted, default tab stops are used.
	'\"
	'\" .BS
	'\" Start box enclosure. From here until next .BE, everything will be
	'\" enclosed in one large box.
	'\"
	'\" .BE
	'\" End of box enclosure.
	'\"
	'\" .CS
	'\" Begin code excerpt.
	'\"
	'\" .CE
	'\" End code excerpt.
	'\"
	'\" .VS ?version? ?br?
	'\" Begin vertical sidebar, for use in marking newly-changed parts
	'\" of man pages. The first argument is ignored and used for recording
	'\" the version when the .VS was added, so that the sidebars can be
	'\" found and removed when they reach a certain age. If another argument
	'\" is present, then a line break is forced before starting the sidebar.
	'\"
	'\" .VE
	'\" End of vertical sidebar.
	'\"
	'\" .DS
	'\" Begin an indented unfilled display.
	'\"
	'\" .DE
	'\" End of indented unfilled display.
	'\"
	'\" .SO
	'\" Start of list of standard options for a Tk widget. The
	'\" options follow on successive lines, in four columns separated
	'\" by tabs.
	'\"
	'\" .SE
	'\" End of list of standard options for a Tk widget.
	'\"
	'\" .OP cmdName dbName dbClass
	'\" Start of description of a specific option. cmdName gives the
	'\" option's name as specified in the class command, dbName gives
	'\" the option's name in the option database, and dbClass gives
	'\" the option's class in the option database.
	'\"
	'\" .UL arg1 arg2
	'\" Print arg1 underlined, then print arg2 normally.
	'\"
	'\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
	'\"
	'\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
	.if t .wh -1.3i ^B
	.nr ^l \n(.l
	.ad b
	'\" # Start an argument description
	.de AP
	.ie !"\\$4"" .TP \\$4
	.el \{\
	. ie !"\\$2"" .TP \\n()Cu
	. el .TP 15
	.\}
	.ta \\n()Au \\n()Bu
	.ie !"\\$3"" \{\
	\&\\$1 \\fI\\$2\\fP (\\$3)
	.\".b
	.\}
	.el \{\
	.br
	.ie !"\\$2"" \{\
	\&\\$1 \\fI\\$2\\fP
	.\}
	.el \{\
	\&\\fI\\$1\\fP
	.\}
	.\}
	..
	'\" # define tabbing values for .AP
	.de AS
	.nr )A 10n
	.if !"\\$1"" .nr )A \\w'\\$1'u+3n
	.nr )B \\n()Au+15n
	.\"
	.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
	.nr )C \\n()Bu+\\w'(in/out)'u+2n
	..
	.AS Tcl_Interp Tcl_CreateInterp in/out
	'\" # BS - start boxed text
	'\" # ^y = starting y location
	'\" # ^b = 1
	.de BS
	.br
	.mk ^y
	.nr ^b 1u
	.if n .nf
	.if n .ti 0
	.if n \l'\\n(.lu\(ul'
	.if n .fi
	..
	'\" # BE - end boxed text (draw box now)
	.de BE
	.nf
	.ti 0
	.mk ^t
	.ie n \l'\\n(^lu\(ul'
	.el \{\
	.\" Draw four-sided box normally, but don't draw top of
	.\" box if the box started on an earlier page.
	.ie !\\n(^b-1 \{\
	\h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
	.\}
	.el \}\
	\h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
	.\}
	.\}
	.fi
	.br
	.nr ^b 0
	..
	'\" # VS - start vertical sidebar
	'\" # ^Y = starting y location
	'\" # ^v = 1 (for troff; for nroff this doesn't matter)
	.de VS
	.if !"\\$2"" .br
	.mk ^Y
	.ie n 'mc \s12\(br\s0
	.el .nr ^v 1u
	..
	'\" # VE - end of vertical sidebar
	.de VE
	.ie n 'mc
	.el \{\
	.ev 2
	.nf
	.ti 0
	.mk ^t
	\h'\|\\n(^lu+3n'\L'\|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-\|\\n(^lu+3n'
	.sp -1
	.fi
	.ev
	.\}
	.nr ^v 0
	..
	'\" # Special macro to handle page bottom: finish off current
	'\" # box/sidebar if in box/sidebar mode, then invoked standard
	'\" # page bottom macro.
	.de ^B
	.ev 2
	'ti 0
	'nf
	.mk ^t
	.if \\n(^b \{\
	.\" Draw three-sided box if this is the box's first page,
	.\" draw two sides but no top otherwise.
	.ie !\\n(^b-1 \h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
	.el \h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
	.\}
	.if \\n(^v \{\
	.nr ^x \\n(^tu+1v-\\n(^Yu
	\kx\h'-\\nxu'\h'\|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'\|0u'\c
	.\}
	.bp
	'fi
	.ev
	.if \\n(^b \{\
	.mk ^y
	.nr ^b 2
	.\}
	.if \\n(^v \{\
	.mk ^Y
	.\}
	..
	'\" # DS - begin display
	.de DS
	.RS
	.nf
	.sp
	..
	'\" # DE - end display
	.de DE
	.fi
	.RE
	.sp
	..
	'\" # SO - start of list of standard options
	.de SO
	.SH "STANDARD OPTIONS"
	.LP
	.nf
	.ta 5.5c 11c
	.ft B
	..
	'\" # SE - end of list of standard options
	.de SE
	.fi
	.ft R
	.LP
	See the \\fBoptions\\fR manual entry for details on the standard options.
	..
	'\" # OP - start of full description for a single option
	.de OP
	.LP
	.nf
	.ta 4c
	Command-Line Name: \\fB\\$1\\fR
	Database Name: \\fB\\$2\\fR
	Database Class: \\fB\\$3\\fR
	.fi
	.IP
	..
	'\" # CS - begin code excerpt
	.de CS
	.RS
	.nf
	.ta .25i .5i .75i 1i
	..
	'\" # CE - end code excerpt
	.de CE
	.fi
	.RE
	..
	.de UL
	\\$1\l'\|0\(ul'\\$2
	..
	.TH Tk_CanvasPs 3 4.0 Tk "Tk Library Procedures"
	.BS
	.SH NAME
	Tk_CanvasPsY, Tk_CanvasPsBitmap, Tk_CanvasPsColor, Tk_CanvasPsFont, Tk_CanvasPsPath, Tk_CanvasPsStipple \- utility procedures for generating Postscript for canvases
	.SH SYNOPSIS
	.nf
	\fB#include <tk.h>\fR
	.sp
	double
	\fBTk_CanvasPsY\fR(\fIcanvas, canvasY\fR)
	.sp
	int
	\fBTk_CanvasPsBitmap\fR(\fIinterp, canvas, bitmap, x, y, width, height\fR)
	.sp
	int
	\fBTk_CanvasPsColor\fR(\fIinterp, canvas, colorPtr\fR)
	.sp
	int
	\fBTk_CanvasPsFont\fR(\fIinterp, canvas, tkFont\fR)
	.sp
	\fBTk_CanvasPsPath\fR(\fIinterp, canvas, coordPtr, numPoints\fR)
	.sp
	int
	\fBTk_CanvasPsStipple\fR(\fIinterp, canvas, bitmap\fR)
	.SH ARGUMENTS
	.AS "unsigned int" "numPoints"
	.AP Tk_Canvas canvas in
	A token that identifies a canvas widget for which Postscript is
	being generated.
	.AP double canvasY in
	Y-coordinate in the space of the canvas.
	.AP Tcl_Interp *interp in/out
	A Tcl interpreter; Postscript is appended to its result, or the
	result may be replaced with an error message.
	.AP Pixmap bitmap in
	Bitmap to use for generating Postscript.
	.AP int x in
	X-coordinate within \fIbitmap\fR of left edge of region to output.
	.AP int y in
	Y-coordinate within \fIbitmap\fR of top edge of region to output.
	.AP "int" width in
	Width of region of bitmap to output, in pixels.
	.AP "int" height in
	Height of region of bitmap to output, in pixels.
	.AP XColor *colorPtr in
	Information about color value to set in Postscript.
	.AP Tk_Font tkFont in
	Font for which Postscript is to be generated.
	.AP double *coordPtr in
	Pointer to an array of coordinates for one or more
	points specified in canvas coordinates.
	The order of values in \fIcoordPtr\fR is x1, y1, x2, y2, x3, y3,
	and so on.
	.AP int numPoints in
	Number of points at \fIcoordPtr\fR.
	.BE

	.SH DESCRIPTION
	.PP
	These procedures are called by canvas type managers to carry out
	common functions related to generating Postscript.
	Most of the procedures take a \fIcanvas\fR argument, which
	refers to a canvas widget for which Postscript is being
	generated.
	.PP
	\fBTk_CanvasPsY\fR takes as argument a y-coordinate in the space of
	a canvas and returns the value that should be used for that point
	in the Postscript currently being generated for \fIcanvas\fR.
	Y coordinates require transformation because Postscript uses an
	origin at the lower-left corner whereas X uses an origin at the
	upper-left corner.
	Canvas x coordinates can be used directly in Postscript without
	transformation.
	.PP
	\fBTk_CanvasPsBitmap\fR generates Postscript to describe a region
	of a bitmap.
	The Postscript is generated in proper image data format for Postscript,
	i.e., as data between angle brackets, one bit per pixel.
	The Postscript is appended to \fIinterp->result\fR and TCL_OK is returned
	unless an error occurs, in which case TCL_ERROR is returned and
	\fIinterp->result\fR is overwritten with an error message.
	.PP
	\fBTk_CanvasPsColor\fR generates Postscript to set the current color
	to correspond to its \fIcolorPtr\fR argument, taking into account any
	color map specified in the \fBpostscript\fR command.
	It appends the Postscript to \fIinterp->result\fR and returns
	TCL_OK unless an error occurs, in which case TCL_ERROR is returned and
	\fIinterp->result\fR is overwritten with an error message.
	.PP
	\fBTk_CanvasPsFont\fR generates Postscript that sets the current font
	to match \fItkFont\fR as closely as possible.
	\fBTk_CanvasPsFont\fR takes into account any font map specified
	in the \fBpostscript\fR command, and it does
	the best it can at mapping X fonts to Postscript fonts.
	It appends the Postscript to \fIinterp->result\fR and returns TCL_OK
	unless an error occurs, in which case TCL_ERROR is returned and
	\fIinterp->result\fR is overwritten with an error message.
	.PP
	\fBTk_CanvasPsPath\fR generates Postscript to set the current path
	to the set of points given by \fIcoordPtr\fR and \fInumPoints\fR.
	It appends the resulting Postscript to \fIinterp->result\fR.
	.PP
	\fBTk_CanvasPsStipple\fR generates Postscript that will fill the
	current path in stippled fashion.
	It uses \fIbitmap\fR as the stipple pattern and the current Postscript
	color; ones in the stipple bitmap are drawn in the current color, and
	zeroes are not drawn at all.
	The Postscript is appended to \fIinterp->result\fR and TCL_OK is
	returned, unless an error occurs, in which case TCL_ERROR is returned and
	\fIinterp->result\fR is overwritten with an error message.

	.SH KEYWORDS
	bitmap, canvas, color, font, path, Postscript, stipple