Mark Andrus Roberts fbc7b72271 Add visual bell support ... This commit adds support for a visual bell. Although the Handler in src/ansi.rs warns "Hopefully this is never implemented", I wanted to give it a try. A new config option is added, `visual_bell`, which sets the `duration` and `animation` function of the visual bell. The default `duration` is 150 ms, and the default `animation` is `EaseOutExpo`. To disable the visual bell, set its duration to 0. The visual bell is modeled by VisualBell in src/term/mod.rs. It has a method to ring the bell, `ring`, and another method, `intensity`. Both return the "intensity" of the bell, which ramps down from 1.0 to 0.0 at a rate set by `duration` and `animation`. Whether or not the Processor waits for events is now configurable in order to allow for smooth drawing of the visual bell.		2017-02-07 21:12:56 -08:00
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text.f.glsl	Add visual bell support	2017-02-07 21:12:56 -08:00
text.v.glsl	Add visual bell support	2017-02-07 21:12:56 -08:00