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+'\"
+'\" Copyright (c) 1990 The Regents of the University of California.
+'\" 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.
+'\" 
+'\" SCCS: @(#) GetPixels.3 1.8 96/03/26 18:11:30
+'\" 
+.so man.macros
+.TH Tk_GetPixels 3 "" Tk "Tk Library Procedures"
+.BS
+.SH NAME
+Tk_GetPixels, Tk_GetScreenMM \- translate between strings and screen units
+.SH SYNOPSIS
+.nf
+\fB#include <tk.h>\fR
+.sp
+int
+\fBTk_GetPixels(\fIinterp, tkwin, string, intPtr\fB)\fR
+.sp
+int
+\fBTk_GetScreenMM(\fIinterp, tkwin, string, doublePtr\fB)\fR
+.SH ARGUMENTS
+.AS "Tcl_Interp" *joinPtr
+.AP Tcl_Interp *interp in
+Interpreter to use for error reporting.
+.AP Tk_Window tkwin in
+Window whose screen geometry determines the conversion between absolute
+units and pixels. 
+.AP char *string in
+String that specifies a distance on the screen.
+.AP int *intPtr out
+Pointer to location in which to store converted distance in pixels.
+.AP double *doublePtr out
+Pointer to location in which to store converted distance in millimeters.
+.BE
+
+.SH DESCRIPTION
+.PP
+These two procedures take as argument a specification of distance on
+the screen (\fIstring\fR) and compute the corresponding distance
+either in integer pixels or floating-point millimeters.
+In either case, \fIstring\fR specifies a screen distance as a
+floating-point number followed by one of the following characters
+that indicates units:
+.TP
+<none>
+The number specifies a distance in pixels.
+.TP
+\fBc\fR
+The number specifies a distance in centimeters on the screen.
+.TP
+\fBi\fR
+The number specifies a distance in inches on the screen.
+.TP
+\fBm\fR
+The number specifies a distance in millimeters on the screen.
+.TP
+\fBp\fR
+The number specifies a distance in printer's points (1/72 inch)
+on the screen.
+.PP
+\fBTk_GetPixels\fR converts \fIstring\fR to the nearest even
+number of pixels and stores that value at \fI*intPtr\fR.
+\fBTk_GetScreenMM\fR converts \fIstring\fR to millimeters and
+stores the double-precision floating-point result at \fI*doublePtr\fR.
+.PP
+Both procedures return \fBTCL_OK\fR under normal circumstances.
+If an error occurs (e.g. \fIstring\fR contains a number followed
+by a character that isn't one of the ones above) then
+\fBTCL_ERROR\fR is returned and an error message is left
+in \fIinterp->result\fR.
+
+.SH KEYWORDS
+centimeters, convert, inches, millimeters, pixels, points, screen units