![]() A TrueType font file includes many different kinds of information used by the TrueType rasterizer and the operating system software to ensure that characters display on the computer screen or print out exactly as the font designer intended them to. Filling the adjusted outline with pixels (scan conversion).Ī digital font contains much more than just the characters associated with a given alphabet or script.Adjusting the outline description to the pixel grid (based on hinting information).Scaling the outline description of the character to the requested size and device resolution.Reading the outline description of the character (lines and splines) from the TrueType font file.It accomplishes this by performing the following tasks: The job of the TrueType Rasterizer is to generate character bitmaps for screens and printers (otherwise known as raster devices). With this in mind, it has been written with a well defined client interface, and a clean modular structure in portable C. The TrueType Rasterizer is a computer program which is typically incorporated as part of an operating system or printer control software. The TrueType font technology consists of two parts: the description of the fonts themselves (the TrueType font files), and the program which reads the font description and generates the bitmaps (the TrueType Rasterizer). If you're using Apple Macintosh or Windows based computers, all you need to do is purchase the fonts you want to use. If you're using a Mac or a Windows machine, the chances are that you're already using the TrueType rasterizer and the TrueType fonts both Apple and Microsoft include with the basic operating system. It is the interaction between the TrueType fonts, the TrueType rasterizer and the software program in which the TrueType font is used that determines the appearance of the letterforms in the font. The TrueType font technology consists of two components: the TrueType fonts themselves, which come in many thousands of different styles, and can be purchased individually or in collections from font manufacturers and the TrueType rasterizer, a piece of software built into System 7.x on the Apple Macintosh range of computers, and also into Microsoft's Windows family of operating systems.īoth components - the font and the rasterizer, are necessary to display and print TrueType fonts on a computer system. The history of TrueType's development is discussed briefly in our History of TrueType document, which explains the various incarnations of the technology, as well as some of the reasons TrueType exists at all. TrueType fonts offer the highest possible quality on computer screens and printers, and include a range of features which make them easy to use. Microsoft has distributed millions of quality TrueType fonts in hundreds of different styles, including them in its range of products and the popular TrueType Font Packs. TrueType is a digital font technology designed by Apple Computer, and now used by both Apple and Microsoft in their operating systems.
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