Swashes would be useful for switching glyphs based on a preceding glyph (e.g. regional indicator symbols) into another unique glyph (e.g. Ligatures seem like a good fit for mapping multiple glyphs (e.g. Text features are also useful for writing systems, such as Roman, that can use effects such as ligatures and cursive connections to enhance the appearance of text." These transformations, called text features, are essential for writing systems such as Arabic or Hindi that require changes to glyphs and words depending on context. "The extended glyph metamorphosis table (tag name: 'morx') allows you to specify a set of transformations that can apply to the glyphs of your font. The documentation describes the table thusly: Additional information for the glyphs is contained in the 'morx' table.This glyph contains a bitmap for the country's flag.Īny glyph that is a composed character in Emoji, can't represented in a 'cmap' because of its one-to-one mapping between a code point and a glyph name. There is a glyph with the name "u1F1FF_u1F1FC" that has entries in both the 'glyf' and 'sbix' tables. Similarly, U+1F1FF U+1F1FC (regional indicator symbols "Z" & "W" for Zimbabwe) has no character map entry. The glyphs for "u261D.1" through "u261D.5", which are used for the different skin tones, are not in the character map. For example, only the WHITE UP POINTING INDEX (U+261D) Emoji is included mapping code point 0x261d to the glyph named "u261D.0". Some, but not all, glyphs have entries in the 'cmap' table.They all have PostScript names ('post'), too. All glyphs have horizontal ('hmtx') and vertical ('vmtx') metrics.The width and height metrics for these glyphs is 800. The left and top side bearings for the glyphs with 'sbix' resources are both 0.Some 'glyf' resources, such as those for the regional indicator symbols, contain multiple contours but no data in the 'sbix' strikes.Each of these 'sbix' resources has a corresponding 'glyf' resource which defines two contours for a 800x800 bounding box.The 'sbix' (extended bitmaps) table contains seven strikes with PNG data at 72 dpi for the following sizes:Ģ0x20, 32x32, 40x40, 48x48, 64圆4, 96x96 and 160x160.Vmtx - the vertical spacing for each glyph in vertical font Vhea - contains information needed for vertical fonts Trak - tracking which allows adjustment to normal interglyph spacing Sbix - bitmap data in a standard graphics format The font contains the following optional tables:.The font contains the following required tables:.I'm guessing this oversight is because the Emoji font is compiled by special tools, not created in a font editor where a designer would notice it missing. It's the only Apple font without this information. As of OS X 10.11, the version is 11.0d7e1. The file is located at /System/Library/Fonts/Apple Color Emoji.ttf.A special glyph id 65535 in a swash lookup tableīy reverse engineering, we can determine the following characteristics about the standard Emoji font on iOS and OS X:. ![]()
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