![]() (The different color palettes are useful for displaying the font on dark and light backgrounds.) So when there is support for this new color feature, the base glyphs will be replaced with the colored layers. And the CPAL (“Color Palette”) table stores one or more color palettes for the individual layers. But there are two additional tables in the font: the COLR table links additional glyphs as layers to the base glyphs and defines the order of these layers. It has Unicode-encoded, uncolored “base glyphs”. Instead of using PNG images, they introduced a support for layered vector glyphs!īy default, the new Segoe UI Emoji font behaves like a regular TrueType/OpenType font. But they did it in a very different way than Apple and Google. With Windows 8.1, Microsoft’s operating system now also supports color emoji. Windows did already support the typical Unicode emoji characters with its Segoe UI Symbol font, but it was a regular TrueType-based font which did not support colors. The specification was made public and is now being implemented in FreeType. Google’s solution is very similar to Apple’s (but not compatible) and also uses PNG images. It was a big hit, especially for the use in messaging apps, and it was no surprise that Apple’s competitors also began to work on color fonts. ![]() The single PNG images-one per glyph-are then embedded within running text and can be scaled and copied like regular characters. ![]() ![]() It’s a proprietary, unpublished extension of the TrueType/OpenType specification to add PNG images to a font. But the makers of operating systems and apps never really cared about these technologies-until the major success of the Emoji character sets in Asia.Īpple took the lead when they implemented the Apple Color Emoji font in iOS and OS X. When Adobe invented PostScript their Type 3 font standard allowed to specify colors within a font and Fontlab’s bitmap-based Photofont technology is also around for years. Here is how it works and what it could mean for the use of color fonts in the future.Ĭolor fonts are by no means a new idea. With Windows 8.1 Microsoft introduced a new way to add color to fonts. ![]()
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