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A few more font docs

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Simon Hausmann 2020-11-25 08:44:42 +01:00
parent af8df5cfbe
commit 5e37fa027b
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11
sixtyfps_runtime/corelib/font/mod.rs
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@ -9,6 +9,17 @@
LICENSE END */
/*!
Font abstraction for the run-time library.
The module receives FontRequest objects and returns Rc<Font>, which represents a font provided by
the underlying platform that matches the specified font request as closely as possible.
Internally a FontRequest is resolved to a Rc<PlatformFont> and a list of Rc<Font> instances, one for
each pixel size. The Rc<Font> is basically an Rc<PlatformFont> and the pixel size specific, cached glyph
metrics -- base on the assumption that the platform provides scalable fonts.
On the graphics side, the generated rasterized glyphs may be cached in textures. That cache is indexed by the
Rc<PlatformFont> since the underlying platform may map different font requests to the same physical PlatformFont
(typically backed by a .ttf file or ttf inside a .ttc)
*/
use crate::string::SharedString;
use std::cell::RefCell;