diff options
Diffstat (limited to 'doc/FontId.3')
| -rw-r--r-- | doc/FontId.3 | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/doc/FontId.3 b/doc/FontId.3 index bed71c3..60905a7 100644 --- a/doc/FontId.3 +++ b/doc/FontId.3 @@ -17,12 +17,10 @@ fonts Font \fBTk_FontId(\fItkfont\fB)\fR .sp -void \fBTk_GetFontMetrics(\fItkfont, fmPtr\fB)\fR .sp int \fBTk_PostscriptFontName(\fItkfont, dsPtr\fB)\fR - .SH ARGUMENTS .AS Tk_FontMetrics *dsPtr .AP Tk_Font tkfont in @@ -30,12 +28,11 @@ Opaque font token being queried. Must have been returned by a previous call to \fBTk_GetFont\fR. .AP Tk_FontMetrics *fmPtr out Pointer to structure in which the font metrics for \fItkfont\fR will -be stored. +be stored. See \fBDATA STRUCTURES\fR below for details. .AP Tcl_DString *dsPtr out Pointer to an initialized \fBTcl_DString\fR to which the name of the Postscript font that corresponds to \fItkfont\fR will be appended. .BE - .SH DESCRIPTION .PP Given a \fItkfont\fR, \fBTk_FontId\fR returns the token that should be @@ -51,10 +48,12 @@ documentation for the \fBfont\fR command for definitions of the terms ascent, descent, and linespace, used in font metrics. .PP \fBTk_PostscriptFontName\fR maps a \fItkfont\fR to the corresponding -Postcript font name that should be used when printing. The return value +Postscript font name that should be used when printing. The return value is the size in points of the \fItkfont\fR and the Postscript font name is appended to \fIdsPtr\fR. \fIDsPtr\fR must refer to an initialized -\fBTcl_DString\fR. Given a ``reasonable'' Postscript printer, the +\fBTcl_DString\fR. Given a +.QW reasonable +Postscript printer, the following screen font families should print correctly: .IP \fBAvant Garde\fR, \fBArial\fR, \fBBookman\fR, \fBCourier\fR, @@ -65,18 +64,18 @@ following screen font families should print correctly: .PP Any other font families may not print correctly because the computed Postscript font name may be incorrect or not exist on the printer. -.VS 8.0 br .SH "DATA STRUCTURES" -The Tk_FontMetrics data structure is used by Tk_GetFontMetrics to return -information about a font and is defined as follows: +The \fBTk_FontMetrics\fR data structure is used by \fBTk_GetFontMetrics\fR to +return information about a font and is defined as follows: .CS typedef struct Tk_FontMetrics { - int ascent; - int descent; - int linespace; + int \fIascent\fR; + int \fIdescent\fR; + int \fIlinespace\fR; } Tk_FontMetrics; .CE -The \fIlinespace\fR field is the amount in pixels that the tallest +.PP +The \fIascent\fR field is the amount in pixels that the tallest letter sticks up above the baseline, plus any extra blank space added by the designer of the font. .PP @@ -88,6 +87,7 @@ The \fIlinespace\fR is the sum of the ascent and descent. How far apart two lines of text in the same font should be placed so that none of the characters in one line overlap any of the characters in the other line. -.VE +.SH "SEE ALSO" +font(n), MeasureChar(3) .SH KEYWORDS -font +font, measurement, Postscript |