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.\" ========================================================================
.\"
.IX Title "tmp::NG7L0MUk7i::Hoola 3"
.TH tmp::NG7L0MUk7i::Hoola 3 "2018-12-25" "EN Tools" "EN Tools"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
wml::des::gfont \- Graphical Font Tag
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #use wml::des::gfont
\&
\& One Single Line Of Text
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is a nice interface to the \fBgFONT\fR program which can be found at
http://www.engelschall.com/sw/gfont/. It provides a \f(CW\*(C`\*(C'\fR tag
which can be used similar to the standard \s-1HTML\s0 tag \f(CW\*(C`\*(C'\fR. But
instead of online rendering by the webbrowser the text is rendered offline via
\&\fIgfont\fR into a \s-1GIF\s0 image. This has the following advantages:
.IP "All TeX-available fonts can be used." 4
.IX Item "All TeX-available fonts can be used."
you can use any TeX-available fonts instead of the commonly known ones the
typical browsers support. These fonts will actually look like you want, i.e.
Helvetica _is_ Helvetica with \f(CW\*(C`\*(C'\fR while it can be Arial or a
totally different (substituted) font when using the \f(CW\*(C`\*(C'\fR tag.
.IP "Fonts with much greater size can be used." 4
.IX Item "Fonts with much greater size can be used."
With \f(CW\*(C`\*(C'\fR you can increase the \f(CW\*(C`size\*(C'\fR attribute up to \f(CW+9\fR
which is actually 200pt in size while the \s-1HTML\s0 \fBfont\fR tag usually stops at
\&\f(CW+4\fR. So \f(CW\*(C`\*(C'\fR can be used for big headlines.
.IP "You can create banners with colored backgrounds." 4
.IX Item "You can create banners with colored backgrounds."
The standard \f(CW\*(C`\*(C'\fR tag cannot use a different background color in
\&\s-1HTML 3.2,\s0 \f(CW\*(C`\*(C'\fR can. Because it directly renders into a \s-1GIF\s0 image
which background has not to be transparent.
.PP
When an image is generated, a text file containing the command which has
been run is created, its name is the image file name with a \f(CW\*(C`.cmd\*(C'\fR
suffix. When \s-1WML\s0 is re-run, this file is searched for and gFONT
executed only if command line has changed.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
.IP "base=\fIfilename\fR" 4
.IX Item "base=filename"
Usually the created images for a source file \fIpage.wml\fR are named
\&\fIpage.gfontXXX.gif\fR where \f(CW\*(C`XXX\*(C'\fR is a number starting with \f(CW000\fR. When you
use a \f(CW\*(C`base=foo\*(C'\fR attribute, then the resulting files are named
\&\fIfoo.gfontXXX.gif\fR. Actually you can even use a complete filename including
a directory prefix, i.e. when you use \f(CW\*(C`base=../../common/foo\*(C'\fR attribute,
then the \s-1GIF\s0 images are created as \fI../../common/foo.gfontXXX.gif\fR. Use this
feature to direct the images to a particular directory. Additionally using a
\&\f(CW\*(C`base=""\*(C'\fR attribute leads to images which are so-called hidden Unix files or
dot-files.
.Sp
And for most flexibility when no base is specified and the variable
\&\f(CW\*(C`GFONT_BASE\*(C'\fR is defined (usually from within a \fI.wmlrc\fR file via
\&\f(CW\*(C`\-DGFONT_BASE~path/to/gfont/dir/base\*(C'\fR) it is used. Use this feature to
redirect the created images to a particular directory.
.Sp
You may also use the variable \f(CW\*(C`IMAGE_BASE\*(C'\fR which defines in a single line
all base names for images generated by \s-1WML.\s0
.IP "file=\fIfilename\fR" 4
.IX Item "file=filename"
Use this to explicitly set the output filename for the \s-1GIF\s0 image. This is
usually not used, because you don't need to know the actual filename. But
sometimes it can be useful to explicitly set it.
.IP "notag" 4
.IX Item "notag"
This forces \f(CW\*(C`\*(C'\fR to expand to nothing, i.e. no resulting
\&\f(CW\*(C`\*(C'\fR tag. The image itself is still generated. In combination with
the above \f(CW\*(C`file\*(C'\fR attribute this can be used to generate images to particular
files which can be used at other positions, for instance inside
\&\f(CW\*(C`\*(C'\fR (see \fBwml::des::rollover\fR\|(3)) tags.
.IP "color=#\fIrrggbb\fR" 4
.IX Item "color=#rrggbb"
Sets the font (foreground) color. Default is \f(CW\*(C`#000000\*(C'\fR which is black.
.IP "bgcolor=#\fIrrggbb\fR" 4
.IX Item "bgcolor=#rrggbb"
Sets the image background color. Default is no color at all, i.e. transparent
background.
.IP "face=\fIfontname\fR" 4
.IX Item "face=fontname"
Sets the type of the used font where \fIfontname\fR is actually any TeX-available
font or a name alias from the \fIFontmap\fR file of gFONT. See \fBgfont\fR\|(1) for more
details. Default is \f(CW\*(C`Times\*(C'\fR.
.IP "size=\fInumber\fR" 4
.IX Item "size=number"
Sets the relative size of the font, similar to the \s-1HTML 3.2\s0 \f(CW\*(C`\*(C'\fR and
\&\f(CW\*(C`\*(C'\fR tags on typical browser setups.
.IP "align=\fIlocation\fR" 4
.IX Item "align=location"
This directly corresponds to the \f(CW\*(C`align\*(C'\fR attribute of the \f(CW\*(C`\*(C'\fR
tag.
.IP "crop" 4
.IX Item "crop"
This indicates that the image should be cropped, i.e. the edges containing only
the background color should be removed.
.IP "adjust=\fIspec\fR" 4
.IX Item "adjust=spec"
This passes through \fIspec\fR to the \fB\-r\fR option of gFONT which adjusts the
size of the final image. Use this to expand the image and/or align it.
.IP ":img:\fI\s-1ATTR\s0\fR=\fI\s-1STR\s0\fR" 4
.IX Item ":img:ATTR=STR"
The ``\fI\s-1ATTR\s0\fR=\fI\s-1STR\s0\fR'' pairs are passed along to the \f(CW\*(C`\*(C'\fR \s-1HTML\s0 tag.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
.Vb 3
\&
\& A sample Headerline
\&
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
.Vb 3
\& Ralf S. Engelschall
\& rse@engelschall.com
\& www.engelschall.com
.Ve
.SH "REQUIRES"
.IX Header "REQUIRES"
.Vb 2
\& Internal: P1, P2, P3, Image::Size (P5M)
\& External: gfont (PATH)
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1HTML\s0 \f(CW\*(C`\*(C'\fR tag,
\&\fBgfont\fR\|(1),
http://www.engelschall.com/sw/gfont/