The font data locally or from the Web, and may display the character Matching algorithm) Once it has identified a font, it retrieves The user agent first identifies the font in the database that "bestįits" the specified font (according to the font When asked to display a character with a particular font, CSS2 allows stylesheet authors to contribute towards thatĭatabase. In the CSS font model, each user agent has a "font database" at itsĭisposition. Synthesis and progressive rendering, and enables fonts to be CSS2 improves client-side font matching, enables font In selecting a font when an author's requested font is not immediatelyĪvailable. Had no way to suggest any other fonts (even stylistically similarįonts that the user agent had available) other than generic defaultĬSS2 changes all that, and allows user agents much greater liberty Alternate fontsĬould be specified with the properties, but beyond that, user agents The client system and were identified solely by name. In CSS1, all fonts were assumed to be present on What use the user agent makes of these properties differs greatlyīetween CSS1 and CSS2.
In both CSS1 and CSS2, authors specify font characteristics If not, what should be done? Should a different font be substituted?Ĭan the font be synthesized? Can it be retrieved from the Web?.If so, what glyph or glyphs does this character (or sequence of.Does the client's user agent have this font available?.
Has the author specified a font for this character?.Size, appearance, and other attributes associated with the entire set.Ī visual user agent must address the following issues before actually Representations, all observing same basic motif according to design, Representation is the actual artistic representation of anĪbstract glyph, in some typographic style, in the form of outlines or More glyphs, in a possibly context-dependent fashion. Of that character) One or more characters may be depicted by one or (as opposed to, for example, an aural, textual, or numerical depiction That may be drawn on the screen, paper, etc.Įach of these glyphs constitutes a graphical depiction of a character. (abstract information element) must be mapped to some representation When a document's text is to be displayed visually, each character Examples of font matching 14.1 Introduction.Height of lowercase glyph representations.Height of capital glyph representations.Descriptors for Synthesis: 'widths' and 'definition-src'.Descriptor for Numeric Values: 'units-per-em'.Descriptors for Font Data Qualification: 'unicode-range'.Font Descriptions and Descriptors for Selecting a Font:.Shorthand font property: the 'font' property.