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• Truetype Font File Download Windows 10
• Truetype Fonts Free Download Windows

About TTF Files. Our goal is to help you understand what a file with a.ttf suffix is and how to open it. The TrueType Font file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. FontZone.net offers thousands of free fonts to enhance your own websites, documents, greeting cards, and more. You can browse popular fonts by themes, name or style. FontZone.net helps millions of designers across the globe expressing their creativity with much more diversity.

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Introduction

This chapter documents the tables that make up a TrueType font file, including AAT extensions to the core TrueType specification. Documentation is not included for OpenType-specific tables, even those supported on OS X and iOS. For further information on those tables, see the OpenType specification.

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Table 1 describes the data types used in TrueType font files on all platforms.

With the exception of the font directory which must appear first in the font file, the tables that make up a font can appear in any order. For convenience in accessing the information presented in this chapter, tables are described in alphabetical order.

Data Types

In addition to standard integer data types, the TrueType font format uses the following:

Table 1: The 'sfnt' data types

NOTE: A shortFrac is an int16_t with a bias of 14. This means it can represent numbers between 1.999 (0x7fff) and -2.0 (0x8000). 1.0 is stored as 16384 (0x4000) and -1.0 is stored as -16384 (0xc000).

TrueType Font files: an overview

A TrueType font file consists of a sequence of concatenated tables. A table is a sequence of words. Each table must be long aligned and padded with zeroes if necessary.

The first of the tables is the font directory, a special table that facilitates access to the other tables in the font. The directory is followed by a sequence of tables containing the font data. These tables can appear in any order. Certain tables are required for all fonts. Others are optional depending upon the functionality expected of a particular font.

The tables have names known as tags. Tags have the type uint32. Currently defined tag names consist of four characters. Tag names with less than four characters have trailing spaces. When tag names are shown in text they are enclosed in straight quotes.

Tables that are required must appear in any valid TrueType font file. The required tables and their tag names are shown in Table 2.

Table 2: The required tables

Warning!

Apple makes a distinction between a 'TrueType font' (which refers to a particular font outline definition technology) and an 'sfnt-housed font,' which refers to any font which uses the same packaging format as a TrueType font: that is, it uses the same directory structure and the same table format and meaning for any tables present.

This is an important distinction, because Apple supports other varieties of sfnt-housed font on OS X and iOS, most notably bitmap-only fonts and OpenType fonts. Informally, people often refer to any sfnt-housed font as a 'TrueType font,' but this is strictly speaking inaccurate.

The 'required' tables listed in Table 2 are only required for TrueType fonts. Other varieites of sfnt-housed font may not have them. For example, bitmap-only sfnt-housed fonts do not have an 'hmtx', 'hhea' or 'head' table. CoreText, Apple's rendering system for Unicode-encoded text, does require that any sfnt-housed font have a 'cmap' and 'name' table.

For font vendors: If you are unsure whether a particular table should be included for your non-TrueType sfnt-housed font, it is generally safe to include it, or you may contact Apple for advice.

For font users: Never assume that any particular table is present in a font on OS X. Fonts may be non-TrueType sfnt-housed fonts and lack some of TrueType's required tables. Moreover, fonts may be ill-formed and yet installed. Provide graceful error handling if a font you are using lacks a table you require.

Optional tables may be needed depending upon the functionality expected of a given font file'. The optional tables and their tag names are listed in Table 3. The 'hdmx' table is used on Macintosh platforms only. The 'OS/2' table is required for fonts that are to be used on that platform but appears in the optional table because it is not required for all TrueType font files.

Apple Advanced Typography (AAT) Tables are used with the Line Layout capability of Apple's CoreText.

Additional tables may be defined to support other platforms, such as OpenType, or to provide for future expansion. Tags for these tables must be registered. Contact Apple Developer Technical Support for information regarding the registration process. Tag names consisting of all lower case letters are reserved for Apple's use.

Table 3: The optional tables

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The Font Directory

The font directory, the first of the tables, is a guide to the contents of the font file. It provides the information required to access the data in the other tables. The directory consists of two parts: the offset subtable and the table directory. The offset subtable records the number of tables in the font and provides offset information enabling quick access to the directory tables. The table directory consists of a sequence of entries, one for each table in the font.

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The offset subtable

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The offset subtable, documented in Table 4, begins with the scaler type of the font. The number of tagged tables in the 'sfnt' follows.The table directory itself and any subtables are not included in this count. The entries for searchRange, entrySelector and rangeShift are used to facilitate quick binary searches of the table directory that follows. Unless a font has a large number of tables, a sequential search will be fast enough.

If a faster search is necessary, a binary search is most easily done on a number of entries that is a power of two. This makes it possible to cut the number of items to search in half by shifting. The remaining offset subtable entries should be set as follows:

• searchRange is the largest power of two less than or equal to the number of items in the table, i.e. the largest number of items that can be easily searched.
• rangeShift is the number of items minus searchRange; i.e. the number of items that will not get looked at if you only look at searchRange items.

Before the search loop starts, compare the target item to the item with number rangeShift. If the target item is less than rangeShift, search from the beginning of the table. If it is greater, search starting at the item with number rangeShift.

• entrySelector is log₂(searchRange). It tells how many iterations of the search loop are needed. (i.e. how many times to cut the range in half)

Note that the searchRange, the entrySelector and the rangeShift are all multiplied by 16 which represents the size of a directory entry.

Table 4: The offset subtable

The scaler type

The scaler type is used by OS X and iOS to determine which scaler to use for this font, that is, to determine how to extract glyph data from the font. Different font scalers wrap different font formats within the basic structure of a TrueType font; the scaler type in the offset subtable of the font's directory is used to indicate which scaler should be used with a particular font. (Non-TrueType fonts housed within the same structure as a TrueType font are referred to as 'sfnt-housed fonts.')

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The values 'true' (0x74727565) and 0x00010000 are recognized by OS X and iOS as referring to TrueType fonts. The value 'typ1' (0x74797031) is recognized as referring to the old style of PostScript font housed in a sfnt wrapper. The value 'OTTO' (0x4F54544F) indicates an OpenType font with PostScript outlines (that is, a 'CFF ' table instead of a 'glyf' table). Other values are not currently supported.

Fonts with TrueType outlines produced for OS X or iOS only are encouraged to use 'true' (0x74727565) for the scaler type value. Fonts for Windows or Adobe products must use 0x00010000.

The table directory

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The table directory follows the offset subtable. Entries in the table directory must be sorted in ascending order by tag. Each table in the font file must have its own table directory entry. Table 5 documents the structure of the table directory.

Table 5: The table directory

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The table directory includes checkSum, a number which can be used to verify the identity of and the integrity of the data in its associated tagged table. Table checksums are the unsigned sum of the longs in a table. The following C function can be used to determine the checksum of a given table:

To calculate the checkSum for the 'head' table which itself includes the checkSumAdjustment entry for the entire font, do the following:

• Set the checkSumAdjustment to 0.
• Calculate the checksum for all the tables including the 'head' table and enter that value into the table directory.
• Calculate the checksum for the entire font.
• Subtract that value from the hex value B1B0AFBA.
• Store the result in checkSumAdjustment.

The checkSum for the 'head table which includes the checkSumAdjustment entry for the entire font is now incorrect. That is not a problem. Do not change it. An application attempting to verify that the 'head' table has not changed should calculate the checkSum for that table by not including the checkSumAdjustment value, and compare the result with the entry in the table directory.

The table directory also includes the offset of the associated tagged table from the beginning of the font file and the length of that table.

Whether you download fonts from a website or have a CD full of typefaces, before you can to use them in your word processor or other software programs you must install TrueType or OpenType fonts in Windows.

There are two ways to install a font in Windows: via the Fonts folder or from the font file.

Instructions in this article apply to Windows 10, Windows 8, and Windows 7.

How to Install Fonts in the Fonts folder

If you downloaded a font as a ZIP file, extract it before you access the Fonts folder.

1. Find the location font(s)you want to install. Open the folder containing the font, but do not open the font file.

   TrueType fonts have the extension.TTF and an icon that is a dog-eared page with two overlapping Ts. They require only this one file for installation and use. OpenType fonts have the extension.TTF or .OTF and a little icon with an O. They also require only this one file for installation and use.

2. Type fonts into the Search box and select the font folder option that appears in the results. The Fonts folder will open.

3. Alternatively, open the Control Panel and make sure it is in Large Icon, Small Icon or Classic View.

4. Go back to the folder containing the font you want to install. Select the font file and drag it to the Fonts folder. Drop it anywhere in the main area of the folder window.

5. Close the folders. The font will now be available to use on your computer.

How to Install a Font from the Font File

Another way to install a font in Windows is to do so directly from the unzipped font file.

1. Navigate to the unzipped font file on your computer.

2. When the font is installed, you can begin using it.

In Windows 10, you can also double-click the font file to open it and select the Install button to install it automatically.

If you have programs running while you install fonts in Windows, they may require that you exit the application and restart for the new fonts to be available in the font menu.