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Adding new fonts and encoding support

Adding new fonts and encoding support

This tutorial explains how to use TrueType, OpenType and Type1 fonts so that you are not limited to the standard fonts any more. The other benefit is that you can choose the font encoding, which allows you to use other languages than the Western ones (the standard fonts having too few available characters).

Remark: for OpenType, only the format based on TrueType is supported (not the one based on Type1).

There are two ways to use a new font: embedding it in the PDF or not. When a font is not embedded, it is searched in the system. The advantage is that the PDF file is lighter; on the other hand, if it's not available, a substitution font is used. So it's preferable to ensure that the needed font is installed on the client systems. If the file is to be viewed by a large audience, it's highly recommended to embed.

Adding a new font requires two steps:
  • Generation of the font definition file
  • Declaration of the font in the script
For Type1, you need the corresponding AFM file. It's usually provided with the font.

Generation of the font definition file

The first step consists in generating a PHP file containing all the information needed by FPDF; in addition, the font file is compressed. To do this, a helper script is provided in the makefont directory of the package: makefont.php. It contains the following function:

MakeFont(string fontfile, [, string enc [, boolean embed]])
fontfile

Path to the .ttf, .otf or .pfb file.

enc

Name of the encoding to use. Default value: cp1252.

embed

Whether to embed the font or not. Default value: true.

The first parameter is the name of the font file. The extension must be either .ttf, .otf or .pfb and determines the font type. If your Type1 font is in ASCII format (.pfa), you can convert it to binary (.pfb) with the help of t1utils.

For Type1 fonts, the corresponding .afm file must be present in the same directory.

The encoding defines the association between a code (from 0 to 255) and a character. The first 128 are always the same and correspond to ASCII; the following are variable. Encodings are stored in .map files. The available ones are:
  • cp1250 (Central Europe)
  • cp1251 (Cyrillic)
  • cp1252 (Western Europe)
  • cp1253 (Greek)
  • cp1254 (Turkish)
  • cp1255 (Hebrew)
  • cp1257 (Baltic)
  • cp1258 (Vietnamese)
  • cp874 (Thai)
  • ISO-8859-1 (Western Europe)
  • ISO-8859-2 (Central Europe)
  • ISO-8859-4 (Baltic)
  • ISO-8859-5 (Cyrillic)
  • ISO-8859-7 (Greek)
  • ISO-8859-9 (Turkish)
  • ISO-8859-11 (Thai)
  • ISO-8859-15 (Western Europe)
  • ISO-8859-16 (Central Europe)
  • KOI8-R (Russian)
  • KOI8-U (Ukrainian)
Of course, the font must contain the characters corresponding to the chosen encoding.

Remark: the standard fonts use cp1252.

After you have called the function (create a new file for this and include makefont.php), a .php file is created, with the same name as the font file. You may rename it if you wish. If the case of embedding, the font file is compressed and gives a second file with .z as extension (except if the compression function is not available, it requires Zlib). You may rename it too, but in this case you have to change the variable $file in the .php file accordingly.

Example: 
<?php
require('makefont/makefont.php');

MakeFont('c:\\Windows\\Fonts\\comic.ttf','cp1252');
?>
which gives the files comic.php and comic.z.

Then copy the generated files to the font directory. If the font file could not be compressed, copy it directly instead of the .z version.

Another way to call MakeFont() is through the command line:

php makefont\makefont.php c:\Windows\Fonts\comic.ttf cp1252

Finally, for TrueType and OpenType fonts, you can also generate the files online instead of doing it manually.

Declaration of the font in the script

The second step is simple. You just need to call the AddFont() method: 
$pdf->AddFont('Comic','','comic.php');
And the font is now available (in regular and underlined styles), usable like the others. If we had worked with Comic Sans MS Bold (comicbd.ttf), we would have written: 
$pdf->AddFont('Comic','B','comicbd.php');

Example

Let's now see a complete example. We will use the font Calligrapher. The first step is the generation of the font files: 
<?php
require('makefont/makefont.php');

MakeFont('calligra.ttf','cp1252');
?>
The script gives the following report:

Warning: character Euro is missing
Warning: character zcaron is missing
Font file compressed: calligra.z
Font definition file generated: calligra.php

The euro character is not present in the font (it's too old). Another character is missing too.

Alternatively we could have used the command line:

php makefont\makefont.php calligra.ttf cp1252

or used the online generator.

We can now copy the two generated files to the font directory and write the script: 
<?php
require('fpdf.php');

$pdf = new FPDF();
$pdf->AddFont('Calligrapher','','calligra.php');
$pdf->AddPage();
$pdf->SetFont('Calligrapher','',35);
$pdf->Write(10,'Enjoy new fonts with FPDF!');
$pdf->Output();
?>

[Demo]

About the euro symbol

The euro character is not present in all encodings, and is not always placed at the same position:
EncodingPosition
cp1250128
cp1251136
cp1252128
cp1253128
cp1254128
cp1255128
cp1257128
cp1258128
cp874128
ISO-8859-1N/A
ISO-8859-2N/A
ISO-8859-4N/A
ISO-8859-5N/A
ISO-8859-7N/A
ISO-8859-9N/A
ISO-8859-11N/A
ISO-8859-15164
ISO-8859-16164
KOI8-RN/A
KOI8-UN/A
ISO-8859-1 is widespread but does not include the euro sign. If you need it, the simplest thing to do is to use cp1252 or ISO-8859-15 instead, which are nearly identical but contain the precious symbol.

Reducing the size of TrueType fonts

Font files are often quite voluminous; this is due to the fact that they contain the characters corresponding to many encodings. Zlib compression reduces them but they remain fairly big. A technique exists to reduce them further. It consists in converting the font to the Type1 format with ttf2pt1 (the Windows binary is available here) while specifying the encoding you are interested in; all other characters will be discarded.
For example, the arial.ttf font that ships with Windows Vista weights 748 KB (it contains 3381 characters). After compression it drops to 411. Let's convert it to Type1 by keeping only cp1250 characters:

ttf2pt1 -b -L cp1250.map c:\Windows\Fonts\arial.ttf arial

The .map files are located in the makefont directory of the package. The command produces arial.pfb and arial.afm. The arial.pfb file weights only 57 KB, and 53 after compression.

It's possible to go even further. If you are interested only by a subset of the encoding (you probably don't need all 217 characters), you can open the .map file and remove the lines you are not interested in. This will reduce the file size accordingly.

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